Lockhart Credit - www.spacefacts.de

Personal: Male, Married. Born in Amarillo, Texas, USA. US Air Force US Air Force

Astronaut Career

Astronaut Group: NASA Group 16 - 1996. Inactive Entered space service: 1 May 1996. Left space service: 2005. Number of Flights: 2.00. Total Time: 27.64 days.

NAME: Paul S. Lockhart (Major, USAF)

NASA Astronaut Candidate (Pilot)

PERSONAL DATA:

Born April 28, 1956 in Amarillo, Texas, to Mr. and Mrs. Charles W. Lockhart. Married to the former Mary Theresa Germaine of Boston, Massachusetts, where her parents, Mr. and Mrs. Joseph R. Germaine, still reside. His mother and stepfather, Joy and Leo Wiley, continue to reside in Amarillo. He enjoys all outdoor sports, including hunting and camping.

EDUCATION:

Graduated from Tascosa High School, Amarillo, Texas, in 1974; received a bachelor of arts degree in mathematics from Texas Tech University in 1978, and a master of science degree in aerospace engineering from the University of Texas in 1981. Studied at the University of Innsbruck and the University of Vienna Summer School from 1978-79 on a Rotarian Fellowship. Has also completed aerospace related courses from Syracuse University and the University of Florida.

ORGANIZATIONS:

Society of Experimental Test Pilots, Order of Daedalians (Fraternal Order of Military Pilots).

AWARDS:

Recipient of Air Force Aerial Achievement Medal, Commendation Medal, Outstanding Unit Award with Valor, National Defense Service Medal, Achievement Medal, and numerous other service recognitions and ribbons. A distinguished graduate of both ROTC and the Air Force Squadron Officer School, Lockhart is also a member of Outstanding Young Men of America and Who's Who in American Colleges.

EXPERIENCE:

Lockhart was commissioned a 2nd Lieutenant in the USAF in 1981. Upon graduation from pilot training in 1983, he was assigned to the 49th Fighter Interceptor Squadron flying T-33s. In 1986, he transitioned to the F-4 and flew operationally with U.S. Air Forces, Europe (in Germany) from 1987-1990 as an instructor pilot for F-4 and F-16 aircrew in the tactics of surface-to-air missile suppression. In 1991 he reported to Edwards Air Force Base for year long training as a test pilot in high performance military aircraft. Upon graduation, he was assigned to the Test Wing at the Air Force Developmental Test Center at Eglin Air Force Base, Florida, performing weapons testing for the F-16 aircraft. During his 4-1/2 year tour at Eglin, he was selected as the Operations Officer for the 39th Flight Test Squadron. Much of America's state-of-the-art weaponry was first tested under his guidance at the 39th Flight Test Squadron.

He has logged over 3,000 hours in more than 30 different aircraft.

NASA EXPERIENCE:

Selected by NASA in April 1996, Lockhart reported to the Johnson Space Center in August 1996 to begin two years of training and evaluation. Successful completion of initial training will qualify him for various technical assignments leading to selection as a pilot on a Space Shuttle flight crew.

• 5 June 2002 Flight: STS-111. Flight Up: STS-111. Flight Back: STS-111. Flight Time: 13.86 days.

• 24 November 2002 Flight: STS-113. Flight Up: STS-113. Flight Back: STS-113. Flight Time: 13.78 days.

5 December 1983 - NASA Astronaut Training Group 16 selected.. The group was selected to provide pilot, engineer, and scientist astronauts for space shuttle flights.. Qualifications: Pilots: Bachelor's degree in engineering, biological science, physical science or mathematics. Advanced degree desirable. At least 1,000 flight-hours of pilot-in-command time. Flight test experience desirable. Excellent health. Vision minimum 20/50 uncorrected, correctable to 20/20 vision; maximum sitting blood pressure 140/90. Height between 163 and 193 cm.

Mission Specialists: Bachelor's degree in engineering, biological science, physical science or mathematics and minimum three years of related experience or an advanced degree. Vision minimum 20/150 uncorrected, correctable to 20/20. Maximum sitting blood pressure of 140/90. Height between 150 and 193 cm.. 10 pilots and 25 mission specialists selected from over 2,400 applicants. 9 additional international astronauts.

Expedition 4 Commander Yury Onufrienko and astronauts Carl Walz and Dan Bursch were launched last Dec. 5 aboard Endeavour's STS-108 mission, and have been on the ISS since Dec. 7.

Endeavour is scheduled for launch on May 30. That would result in a docking with the station on June 1. Endeavour Commander Ken Cockrell, Pilot Paul Lockhart, and mission specialists Chang-Diaz and Perrin are bringing the Expedition 5 crew to the station. That crew is commanded by Valery Korzun and includes astronaut Peggy Whitson and cosmonaut Sergei Treschev.

The first two of the three spacewalks by Chang-Diaz and Perrin will focus on installation of a new Mobile Base System for the station's robotic arm, Canadarm2. It will allow the arm to move along the railroad-like tracks of station's main truss, eventually to reach a length of more than 350 feet. The third spacewalk is to change out the wrist roll joint of Canadarm2.

On Friday, Dan Bursch worked with the Biomass Production System, a plant growth experiment using wheat and a plant related to cabbage and radishes. Each crewmember was scheduled for an hour to pack personal possessions, as they have been for much of this week. On Thursday Walz and Bursch completed their final session with the PuFF (pulmonary function in flight) experiment, which looks at effects of microgravity on lung function.

Several experiments have been deactivated, including the Physics of Colloids in Space, which was shut down Tuesday and which will be returned to Earth on Endeavour. It is a study of fine particles suspended in a fluid. An example of such fluids is paint.

Major systems aboard the station continue to function well as the ISS orbits at an average altitude of about 243 statute miles.

• Bay 1-2: Orbiter Docking System - 1800 kg + 2 EMU spacesuits - 240 kg
• Bay 4: Mobile Base System (MBS) - 1600 kg. The Mobile Base System was made by MD Robotics of Brampton, Ontario. It was to be attached to the Mobile Transporter and used to mount the SSRMS Canadarm-2 arm and heavy payloads.
• Bay 6P: Adapter Beam / Wrist Roll Joint - 150 kg. The WRJ (Wrist Roll Joint) would be swapped with the broken one on the SSRMS arm.
• Bay 7-12: MPLM FM1 "Leonardo" - 10557 kg. The Leonardo module carried 8 Resupply Stowage Racks and 4 Resupply Stowage Plaftorms, with equipment to be transferred to the station. It also carried two science racks: the MSG (Microgravity Science Glovebox) and Express-3, which would be installed on Destiny. Leonardo, built by Alenia Spazio in Torino, also flew on STS-102 and STS-105.
• Bay 13P: ICAPC Beam / PGDF - 75 kg. The PGDF (Power-Data Grapple Fixture) would be installed on the P6 truss.
• Bay 13S: Adapter Beam / SMDP - 200 kg. The Service Module Debris Panels (SMDP) package contained 6 panels which would be stowed on PMA-1 until a later spacewalk attached them to the Zvezda module to protect it from space debris hits.
• Total: 14622 kg

Aboard Endeavour are Commander Ken Cockrell, Pilot Paul Lockhart, Mission Specialists Franklin Chang-Díaz and Philippe Perrin of the French Space Agency, CNES, along with Expedition 5 Commander Valery Korzun and Flight Engineers Peggy Whitson and Sergei Treschev. As Endeavour launched from Florida, the space station orbited 240 statute miles over the southern Indian Ocean west of Perth, Australia.

Aboard the ISS, Expedition 4 Commander Yury Onufrienko and Flight Engineers Carl Walz and Dan Bursch are wrapping up their 182nd day in space, their 180th day on the station. Walz and Bursch will break the U.S. record for the longest single space flight - 188 days - set by astronaut Shannon Lucid in 1996. Another record was equaled today as Chang-Díaz became only the second human to fly in space seven times, tying a mark set in April by Jerry Ross on the STS-110 mission.

Less than nine minutes after launch, Endeavour and its crewmembers settled into orbit and work began to prepare the shuttle for its planned 12-day mission.

Endeavour is scheduled to dock to the station Friday afternoon, setting the stage for the handover between the Expedition 4 and Expedition 5 station crews. Three spacewalks are scheduled during the mission by Chang-Díaz and Perrin. The first two will help install and activate the Mobile Base System, a platform that will be mated to the Mobile Transporter on the S-Zero (S0) Truss. The new platform will allow the station's Canadarm2 robotic arm to "walk off" the Destiny Laboratory onto the Mobile Base System so it can be transported up and down the length of the ISS for future assembly tasks. On the third spacewalk, Chang-Díaz and Perrin will replace a faulty wrist roll joint on the station's robotic arm that has experienced an electrical problem in one of its two data and power channels.

The shuttle crew will go to sleep at 10:23 p.m., and will be awakened at 6:23 a.m. Thursday to begin its first full day in orbit.

Aboard Endeavour, Commander Ken Cockrell, Pilot Paul Lockhart, Mission Specialists Philippe Perrin and Franklin Chang-Díaz and Expedition Five Commander Valery Korzun and Flight Engineers Peggy Whitson and Sergei Treschev, were awakened at 6:23 a.m. Central time by the song "Gettin' Jiggy Wit It," by Will Smith. The song was played for Korzun, who will soon take command of the space station.

The Expedition Four crewmembers - Commander Yury Onufrienko and Flight Engineers Carl Walz and Dan Bursch - are in their 183rd day in space, their 181st day aboard the ISS. They will return to Earth aboard Endeavour after six months in orbit on June 17.

In preparation for docking Friday, Perrin and Chang-Díaz will set up a centerline camera to help Cockrell with views of the station's docking mechanism during Endeavour's final approach tomorrow and will test the orbiter docking system ring. Cockrell and Lockhart will fire the shuttle's jets to raise the altitude of Endeavour and draw it closer to the station. The maneuvers will bring the shuttle about 46 statute miles behind the station by Friday morning.

Cockrell and Perrin will also activate the shuttle's robotic arm and use its cameras to survey the contents of the payload bay, including the Leonardo Multi-Purpose Logistics cargo module, the Mobile Base System and the replacement wrist roll joint for the station's robotic arm, Canadarm2, as well as debris shields for the Zvezda Service Module. Chang-Díaz and Perrin will install these components during three spacewalks scheduled for the mission. Today, they will prepare their spacesuits for use out of the Quest Airlock on the station next week.

Later this morning, Cockrell and Chang-Díaz will participate in a live conversation with Costa Rican President Abel Pacheco and reporters from two Hispanic television networks. Costa Rican-born Chang-Díaz tied the human spaceflight record yesterday when he launched on his seventh mission. Astronaut Jerry Ross set the record in April during the STS-110 mission.

With docking scheduled at 11:17 a.m. CDT tomorrow, STS-111 Commander Ken Cockrell, Pilot Paul Lockhart and Mission Specialists Philippe Perrin and Franklin Chang-Díaz today verified all of Endeavour's equipment is ready. Perrin and Chang-Díaz set up a centerline camera Cockrell will use during Friday's final approach to align Endeavour with the station's docking port. They also successfully tested the shuttle docking system and extended it to a position ready for contact with the station.

Cockrell and Perrin activated the shuttle robotic arm and used its cameras to survey the contents of the payload bay. Perrin and Chang-Díaz, who will conduct the three spacewalks scheduled for the mission, successfully checked out the spacesuits they will use during their scheduled spacewalks. During the first two spacewalks, the duo will help install a new aluminum platform, the Mobile Remote Servicer Base System or MBS, atop the station's railcar, the Mobile Transporter. Once installed, the MBS will allow the station's robotic arm, Canadarm2, to travel along the station railway, moving up and down an eventual 300-foot truss for maintenance and assembly work.

Cockrell and Lockhart fired Endeavour's jets three times today to adjust the speed at which the shuttle is closing in on the station. A final Terminal Phase Initiation burn will be conducted Friday morning to begin the final phase of the rendezvous.

The Expedition Four crewmembers - Commander Yury Onufrienko and Flight Engineers Carl Walz and Dan Bursch - tidied up their orbital home and completed routine maintenance on the eve of the arrival of the STS-111 crew.

Cockrell and Chang-Díaz took time out today to participate in a live conversation with Costa Rican President Abel Pacheco, U.S. Ambassador to Costa Rica John Danilovich and reporters from Univision and Telemundo. Costa Rican-born Chang-Díaz tied the human spaceflight record yesterday when he launched on his seventh mission.

Commander Ken Cockrell, Pilot Paul Lockhart and Mission Specialists Philippe Perrin and Franklin Chang-Díaz, and Expedition Five Commander Valery Korzun and Flight Engineers Peggy Whitson and Sergei Treschev, were awakened just after 4:30 Central time this morning by "American Woman," by Lenny Kravitz, a song selected for Whitson.

At the time of the crew's wakeup call, Endeavour had closed to within 900 statute miles of the ISS, aiming for a linkup to the docking port at the forward end of the Destiny Laboratory at 11:17 a.m. Central time as the two vehicles fly off the northeast coast of Australia, south of New Guinea. On board the station, the Expedition Four crew, Commander Yury Onufrienko and Flight Engineers Carl Walz and Dan Bursch, are spending the morning preparing for the arrival of Endeavour's astronauts and their Expedition Five replacements. Onufrienko, Walz and Bursch are in their 184th day in space, their 182nd day aboard the ISS.

A little less than two hours after Endeavour docks to the station, the hatches between the two spacecraft will open and Onufrienko, Bursch and Walz will greet their counterparts and conduct a safety briefing. Then, the ten astronauts and cosmonauts will begin transferring equipment, supplies and experiments between the two vehicles. The two Expedition crews will exchange their custom-made Soyuz return craft seat liners for the rescue vehicle currently docked to the station. Once the new Expedition Five crew conducts checks of their Russian entry suits, they will officially take over command of station operations, and Onufrienko, Walz and Bursch will become shuttle crewmembers.

All systems aboard Endeavour and the ISS continue to function in excellent shape.

At 2:08 p.m. central time, hatches between Endeavour and the station swung open, and the station's Expedition Four crewmembers-Commander Yury Onufrienko and Flight Engineers Dan Bursch and Carl Walz-greeted their visitors-Cockrell, Lockhart, Mission Specialists Franklin Chang-Díaz and Philippe Perrin and oncoming Expedition Five Commander Valery Korzun and Flight Engineers Peggy Whitson and Sergei Treschev.

The 10 astronauts and cosmonauts immediately set to work transferring priority equipment, supplies and experiments between the two vehicles. Items moving to the station included two Extravehicular Activity spacesuits and EVA tools to be used during the mission's three scheduled spacewalks. The Expedition Five crewmembers' custom-made Soyuz return craft seat liners and their Russian entry suits were transferred from Endeavour to the station at 5:55 p.m. central time, marking the official start of the Expedition Five Increment. With that transfer complete, Onufrienko, Bursch and Walz formally concluded their 182-day stay as space station residents. Korzun, Whitson and Treschev now begin their tenure as the fifth resident crew to live and work on board the International Space Station.

Communications checks between the station's Quest Airlock and the EVA suits Perrin and Chang-Díaz will use also were completed today. The spacewalks will see installation of a new platform, the Mobile Remote Servicer Base System, on the station's railcar, the Mobile Transporter, and replacement of the wrist roll joint on the station's arm.

Late in the day, the Flash Evaporator System Primary B controller failed for an as-yet unknown reason. The system has three redundant controllers, Primary A, Primary B and Secondary, and the failure of one controller will have no effect on mission operations.

The Flash Evaporator System sprays excess supply water into the inside of a trash-can shaped vessel that is wrapped by Freon coils. The heat being carried in these coils causes the water to flash into vapor and be vented overboard, disposing of excess heat and excess supply water.

The newly arrived crewmembers of Expedition Five aboard the International Space Station - Commander Valery Korzun and Flight Engineers Peggy Whitson and Sergei Treschev - will continue settling into their new home today as they work with Endeavour's astronauts to move the Leonardo Multi-Purpose Logistics Module from the shuttle's cargo bay to the Unity module of the complex in advance of the start of the transfer of almost 3 tons of equipment and supplies.

Commander Ken Cockrell, Pilot Paul Lockhart and Mission Specialists Philippe Perrin and Franklin Chang-Díaz, and the newest shuttle crewmembers - former Expedition Four Commander Yury Onufrienko and Flight Engineers Carl Walz and Dan Bursch, were awakened at 4:23 Central time this morning by "I Have a Dream," by ABBA, a song selected for Treschev.

Using the shuttle's robotic arm, Cockrell and Perrin will reach into Endeavour's payload bay and latch onto Leonardo at mid-morning. The pressurized cargo module will be attached to the nadir berthing port on Unity. After Walz and Whitson perform pressure checks, the hatch to the cargo carrier will be opened. Leonardo contains equipment, supplies and experiments necessary for the fifth resident crew's 4 ½-month stay in orbit.

The six Expedition crewmembers will continue their handover conferences and the 10 cosmonauts and astronauts will review procedures for the first spacewalk of the flight tomorrow. Perrin and Chang-Díaz will step out of the Quest Airlock Sunday to begin installing the Mobile Base System, a new platform which will enable the station's robotic arm, Canadarm2, to ride a railway the length of the station for future assembly tasks. Two more spacewalks are scheduled for Tuesday and Thursday to complete the Mobile Base system installation and to replace an ailing wrist roll joint on the station's robotic arm.

The Expedition Five crew officially assumed command of station operations yesterday at 5:55 p.m. Central time, marking the end of the Expedition Four increment at 181 days. Onufrienko, Walz and Bursch are now considered part of Endeavour's crew, aiming for a homecoming on June 17.

Systems on Endeavour and the ISS are functioning normally as the two vehicles orbit the Earth every 90 minutes at an altitude of 240 statute miles.

Commander Ken Cockrell, Pilot Paul Lockhart and Mission Specialists Philippe Perrin and Franklin Chang-Díaz, and the newest shuttle crewmembers - former Expedition Four Commander Yury Onufrienko and Flight Engineers Carl Walz and Dan Bursch, were awakened at 4:23 Central time this morning by "I Have a Dream," by ABBA, a song selected for Treschev.

Using the shuttle's robotic arm, Cockrell and Perrin will reach into Endeavour's payload bay and latch onto Leonardo at mid-morning. The pressurized cargo module will be attached to the nadir berthing port on Unity. After Walz and Whitson perform pressure checks, the hatch to the cargo carrier will be opened. Leonardo contains equipment, supplies and experiments necessary for the fifth resident crew's 4 ½-month stay in orbit.

The six Expedition crewmembers will continue their handover conferences and the 10 cosmonauts and astronauts will review procedures for the first spacewalk of the flight tomorrow. Perrin and Chang-Díaz will step out of the Quest Airlock Sunday to begin installing the Mobile Base System, a new platform which will enable the station's robotic arm, Canadarm2, to ride a railway the length of the station for future assembly tasks. Two more spacewalks are scheduled for Tuesday and Thursday to complete the Mobile Base system installation and to replace an ailing wrist roll joint on the station's robotic arm.

The Expedition Five crew officially assumed command of station operations last night just before 6 p.m. Central time, marking the end of the Expedition Four increment at 182 days. Onufrienko, Walz and Bursch are now considered part of Endeavour's crew, aiming for a homecoming on June 17.

Systems on Endeavour and the ISS are functioning normally as the two vehicles orbit the Earth every 90 minutes at an altitude of 240 statute miles.

The Leonardo Multi-Purpose Logistics Module (MPLM) was unberthed from the payload bay early this morning by Commander Ken Cockrell operating the shuttle's robotic arm to move the module to the station's Unity module. Leonardo's installation proceeded perfectly with completion at 9:28 a.m. Central time. About 4:30 p.m. Central time, the MPLM's hatch was opened. Dan Bursch of Expedition Four called down at 4:52 pm that all crew members had entered the logistics module and were working to get the transfers rolling. The crew got a good start on the movement of more than 5,600 pounds of cargo to the station.

Early today, one of four control moment gyroscopes used in the station's attitude control system experienced a mechanical failure. Flight controllers turned it off and began using the remaining three gyros to maintain the station's attitude. It is believed that one of its spin bearings failed, causing it to seize. Flight Engineer Carl Walz reported that the crew could feel and hear "growling" vibrations as it failed. While the failure is a serious complication for the long-term space station operations, there are multiple backup systems for control of the station's attitude so it poses no threat to the safety of the shuttle or expedition crews. The situation is expected to require only minor changes to the STS-111 flight activities.

Franklin Chang-Díaz, and Perrin, with help from Paul Lockhart, readied their extravehicular mobility unit space suits and tools, and reviewed procedures for Sunday's spacewalk. The two first-time spacewalkers will install a Power and Data Grapple Fixture (PDGF) to the station's P6 solar array truss and temporarily store some Russian meteoroid/debris shields. They'll also remove thermal blankets from the Mobile Base System (MBS) in Endeavour's cargo bay, and support its unberthing. The MBS will be parked on the shuttle's arm near its installation point so that hardware temperatures can equalize before it is attached to the existing Mobile Transporter platform. At the end of the day, flight controllers will activate the MBS from the ground in preparation for the next day's operations. Chang-Díaz also will inspect and photograph the exterior condition of station's failed control moment gryoscope at the end of his spacewalk.

The combined STS-111 crew of Cockrell, Lockhart, Chang-Díaz, Perrin, Yury Onufrienko, Dan Bursch and Carl Walz will wake up at 4:23 am CDT Sunday, while new station Commander Valery Korzun and Flight Engineers Peggy Whitson and Sergei Treschev will arise at 4:53 am.

Chang-Díaz and Perrin ventured outside the station's Quest airlock at 10:27 a.m. Central time. With the help of Endeavour Pilot Paul Lockhart, who guided the spacewalk from inside the shuttle, Chang-Díaz and Perrin first installed a Power and Data Grapple Fixture to the station's P6 truss. The fixture will be used to relocate the P6 truss structure to its final location on the station.

Attached to a foot restraint at the end of the station's robotic arm, Canadarm2, operated by Expedition Five Flight Engineer Peggy Whitson and ISS Commander Valery Korzun, Chang-Díaz gathered six micrometeoroid debris shields from the shuttle cargo bay and, with help from Perrin, temporarily stored them on Pressurized Mating Adapter-1 which links Unity to Zarya. Whitson and Korzun will install the shields on the Zvezda Service Module during a spacewalk set for late July.

Chang-Díaz then conducted a visual and photographic inspection of one of the station's four control moment gyroscopes on the station's Z1 truss, a task that was added to today's spacewalk after the gyroscope experienced a mechanical failure yesterday. The photos may help ground controllers better understand why the gyroscope failed.

Removal of thermal blankets from the Mobile Remote Servicer Base System or MBS was the final task of the spacewalk. At 5:21 p.m. Endeavour Commander Ken Cockrell commanded the release of latches that had secured the MBS to its carrier in the payload bay. Whitson and Carl Walz then latched onto the MBS with Canadarm2, removed it from its carrier, and maneuvered it to a position about three feet above the station's railcar, the Mobile Transporter. Canadarm2 will be left in a parked position overnight to thermally condition the MBS before it is mated to the railcar Monday.

Later, the Canadarm2 robotic arm will be commanded to "walk off" its position attached to the Destiny Laboratory onto a Power and Data Grapple Fixture atop the MBS. The arm will then be able to move up and down along the station truss for use in future assembly operations.

Following an inventory of the tools they used during the spacewalk, Perrin and Chang-Díaz re-entered Quest. Airlock repressurization began at 5:41 p.m. Central time, signaling the end of the spacewalk.

With the help of Endeavour Pilot Paul Lockhart, who will help coordinate the spacewalk from inside Endeavour, Chang-Díaz and Perrin will leave the Quest Airlock this morning for a planned six-hour spacewalk to first install a Power and Data Grapple Fixture to the station's P6 truss for its future relocation. The two first-time space walkers will then temporarily park micrometeoroid debris shields on the Russian segment of the station. Expedition Five Flight Engineer Peggy Whitson and ISS Commander Valery Korzun will install the shields on the Zvezda Service Module during a spacewalk set for late July.

The final task of the spacewalk will involve the removal of thermal blankets from the Mobile Base System. That component will be mated tomorrow to the Mobile Transporter on the S0 (S-Zero) Truss of the ISS to enable the Canadarm2 robotic arm to "walk off" the Destiny Laboratory onto the station's railcar system for transport up and down the length of the complex. Chang-Díaz will be identifiable by solid red stripes on the legs of his spacesuit. Perrin will wear the pure white suit with no stripes.

Commander Ken Cockrell will use the shuttle robotic arm's cameras to monitor the activities outside. Whitson and Endeavour Astronaut Carl Walz will transport Chang-Díaz on the end of Canadarm2 during the spacewalk.

During the spacewalk, Chang-Díaz will conduct a visual and photographic inspection of one of the station's four control moment gyroscopes (CMGs) on the station's Z1 Truss. The gyroscope experienced a mechanical failure of its spin bearing yesterday and will no longer be able to be used to assist in station attitude control.

Three other CMGs are operating normally to provide full attitude control for the ISS. If necessary, station control can be maintained with only two functioning CMGs, with other backup attitude control systems also available. The CMG failure will have no impact on ISS operations. A substitute CMG is available on the ground and program managers are evaluating future replacement options. To accommodate the use of three CMGs and varying thermal conditions, the orientation of the shuttle and station will be altered slightly for today's spacewalk.

Once the protective blankets are removed from the Mobile Base System, Whitson and Walz will latch onto the platform in Endeavour's cargo bay with Canadarm2, remove it from its carrier, and maneuver it to a position just above the Mobile Transporter, which was installed on the S-Zero Truss in April. Canadarm2 will be left in a parked position overnight to thermally condition the Mobile Base System before it is mated to the Transporter railcar Monday.

At the start of their fifth day in space, Endeavour's crew was awakened at 4:23 a.m. Central time to the sound of "Drops of Jupiter" by Train, a tune selected for Cockrell.

The Mobile Base System (MBS), parked overnight on the station's robotic arm about three feet from installation, has had a chance to receive the proper thermal conditioning to match the temperatures on the Mobile Transporter, the actual railcar on the truss itself. Operated by Expedition Five Flight Engineer Peggy Whitson and Endeavour Astronaut Carl Walz, the space station robotic arm will mate the MBS platform to the railcar and flight controllers on the ground will command latches to close to secure the platform in place. Eventually, the station arm will "walk off" its current base location on the Destiny Laboratory to the MBS and ride the railway to move up and down the entire length of the station.

The 10 astronauts and cosmonauts on the Shuttle/Station complex will also continue their transfer of equipment and supplies to the station from the Leonardo Multi-Purpose Logistics Module.

Endeavour's crew - Commander Ken Cockrell, Pilot Paul Lockhart, Mission Specialists Philippe Perrin and Franklin Chang-Díaz, and former station residents Yury Onufrienko, Walz and Dan Bursch - were awakened at 4:23 a.m. Central time to "I Only Have Eyes for You" by the Flamingoes, from the American Graffiti soundtrack which was selected for Lockhart.

Although Expedition Five crewmembers Whitson, Commander Valery Korzun and Flight Engineer Sergei Treschev have been in charge of ISS operations since Friday afternoon, an official change of command ceremony between Expedition crews will occur early this afternoon.

The crews will also participate late today in a review of procedures for tomorrow's second spacewalk by Chang-Díaz and Perrin to hook up cables between the Mobile Base System and the Mobile Transporter and to bolt the two components together. Systems on both Endeavour and the ISS continue to function normally as the two craft orbit the Earth every 90 minutes at an altitude of about 240 statute miles.

The MBS was attached to the Mobile Transporter on the Destiny Lab at 8:03 a.m. Central by Expedition Five Flight Engineer Peggy Whitson and Endeavour Astronaut Carl Walz. The two used the station's robotic arm, Canadarm2, to maneuver the MBS into position. Controllers on the ground then commanded latches on the transporter to close, securing the MBS in place. Eventually, Canadarm2 will "walk off" its current base location on the Destiny Lab onto the MBS. The MBS is an important part of the station's future Mobile Servicing System, which will allow the station's arm to travel the length of the station to perform future construction tasks.

The astronauts and cosmonauts on the Shuttle/Station complex, including STS-111 Commander Ken Cockrell, Pilot Paul Lockhart, Mission Specialists Philippe Perrin and Franklin Chang-Díaz, as well Expedition Four crew Yury Onufrienko, Dan Bursch and Walz, and Expedition Five crewmembers Whitson, Commander Valery Korzun and Flight Engineer Sergei Treschev, continued their transfer of equipment and supplies to the station from the Leonardo Multi-Purpose Logistics Module. As they began their Monday morning in space, the crewmembers already had transferred 73 percent of the equipment and supplies.

Though the Expedition Five crew has been in charge of station operations since Friday afternoon, an official change of command ceremony between the two Expedition crews took place this afternoon. The crew also reviewed procedures for tomorrow's second spacewalk of the mission by Chang-Díaz and Perrin in which the two astronauts will hook up cables between the Mobile Base System and the Mobile Transporter and firmly bolt the two components together.

At 4:53 p.m. today, Endeavour completed a one-hour reboost maneuver to increase the station's altitude by a little over a mile. This is the first of three such maneuvers that eventually will raise the station's altitude by six miles. Systems on both Endeavour and the station continue to function normally as they orbit the Earth every 90 minutes at an altitude of about 240 statute miles.

Chang-Díaz and Perrin ventured outside the station's Quest airlock at 10:20 a.m. Central time. With the help of Pilot Paul Lockhart, who guided the spacewalk from inside the shuttle, Chang-Díaz and Perrin first connected primary and backup cables for video and data, and primary power cables between the Mobile Transporter railcar and the MBS. Once the connections were made, ground controllers sent commands for the MT to remotely plug in its umbilical attachments to receptacles on the S0 (S-Zero) truss railway.

With that complete, Chang-Díaz and Perrin then deployed an auxiliary grapple fixture on the MBS called the Payload Orbital Replacement Unit Accommodation, or POA, and placed it in its final configuration. Identical to the end effectors on Canadarm2, the fixture can grapple payloads and hold them as they are moved along the station's truss atop the MBS.

Continuing to run ahead of schedule, the two spacewalkers then secured four bolts between the MBS and the railcar, completing installation of the new MBS platform. Later this month or next, Canadarm2 will "walk off" the Destiny Laboratory and mate its free hand to any one of four power and data fixtures on the new platform so it can be driven up and down the length of the station's truss for use in future station assembly and maintenance operations.

The spacewalkers then relocated a television camera to its final position on top of a mast atop the MBS. The camera will provide views of station assembly and maintenance operations to ground controllers. Final tasks included adding an extra extension cable for the platform, a wire tie to one of the cables installed earlier during the spacewalk and to photograph connectors near the lower portion of the MBS that tie into the MT.

Following an inventory of the tools they used during the spacewalk, Perrin and Chang-Díaz re-entered Quest. Airlock repressurization began at 3:20 p.m. Central time, signaling the end of the spacewalk. It was the 40th spacewalk in support of ISS assembly and maintenance and the second of the mission, bringing the total spacewalking time for STS-111 to 12 hours and 14 minutes.

After flight controllers verified that all connections on the Mobile Remote Servicer Base System were working properly, the capture latch on Canadarm2 was released. The arm, which had been supplying power to the MBS, was then repositioned for Thursday's third and final spacewalk of the mission, which will see replacement of its wrist roll joint.

Handover conferences between the two Expedition crews and the transfer of equipment and supplies to the Leonardo Multi-Purpose Logistics Module also continued today. Working ahead of schedule, the crew continued to refill the module with unneeded supplies to be returned to Earth.

At 9:19 Central time tonight, Endeavour crewmembers and former Expedition Four Flight Engineers Carl Walz and Dan Bursch will set a new U.S. space endurance record, exceeding Shannon Lucid's record of 188 consecutive days spent in space. Walz will set another record in the process, exceeding Lucid's U.S. record for cumulative days spent in space as he reaches 223 days accrued over the course of five flights. Expedition 4 Commander Yury Onufrienko has spent a total 381 days in space, but remains far behind the world record for time in space of 747 days, held by Sergei Avdeyev.

The first contribution to the station by Canada was the space station's robotic arm, Canadarm2, which was delivered to the ISS last year. Today, in a planned 6 1/2 hour spacewalk, Chang-Díaz and Perrin will connect power and data cables to the newly installed Mobile Base System and permanently bolt it to the Mobile Transporter railcar which was affixed to the S0 (S-Zero) Truss on the ISS in April. The new platform will enable Canadarm2 to "walk off" the Destiny Laboratory and mate itself to any one of four grapple fixtures so it can be driven up and down the length of the station's trusses for future construction tasks.

Canadarm2 has provided power to the Mobile Base System since its unberthing from Endeavour's payload bay Sunday near the end of the first spacewalk. The platform was attached to the Mobile Transporter on Monday. Chang-Díaz and Perrin will connect primary and backup cables for video and data and primary cables for power between the MBS and the Mobile Transporter. Once the cable connections are completed, ground controllers will send commands for the MT to remotely plug in its umbilical attachments to receptacles on the truss railway. Flight controllers will then begin a checkout of the MBS systems to ensure all connections are established.

With that completed, Chang-Díaz and Perrin will deploy an auxiliary grapple fixture on the MBS called the Payload Orbital Replacement Unit Accommodation, or POA. The fixture will be used to transport additional cargo elements on the MBS as it is moved along the truss railway.

After the ground-controlled checkout complete, the two spacewalkers will connect redundant power cables to the MT.

The final task for the spacewalkers will be to relocate a television camera on the MBS and add an extra extension cable for the platform.

Handover conferences between the two Expedition crews and the transfer of equipment and supplies to the Leonardo Multi-Purpose Logistics Module will also continue today. The crew has emptied Leonardo's cargo into the station and is now refilling the module with unneeded supplies to be returned to Earth.

Endeavour's crew - Chang-Díaz, Perrin, Commander Ken Cockrell, Pilot Paul Lockhart, Yury Onufrienko, Carl Walz and Dan Bursch - was awakened at 4:23 a.m. Central this morning to the sound of "Mi PC" by Juan Luis Guerra, selected for Chang-Díaz by his family.

All systems on both Endeavour and the International Space Station continue to function normally as the two craft orbit the Earth every 90 minutes at an altitude of 240 statute miles.

At 1:55 a.m. Central time, Walz set a new U.S. record for most aggregate days spent in orbit, exceeding Shannon Lucid's record as he reached the 223 day mark accrued over five flights. Last night, Walz and Bursch also surpassed Lucid's U.S. single spaceflight endurance record of 188 days at 9:19 p.m. Central time.

Today, along with Expedition Five Commander Valery Korzun and Flight Engineers Peggy Whitson and Sergei Treschev, the 10 astronauts and cosmonauts will continue to transfer unneeded station equipment and supplies to the Leonardo Multi-Purpose Logistics Module to be returned to earth. Handover conferences will also continue between the two Expedition crews.

The crewmembers will also review the plans for the third and final spacewalk of the mission on Thursday. Chang-Díaz and Perrin will replace a faulty wrist roll joint on the space station's robotic arm, the Canadarm2.

Reporters in the U.S., France and Canada will also have a chance to question the two crews on the progress of the flight during a Joint Crew News Conference this afternoon.

The second of three reboosts of the station's altitude will be performed later today, using the shuttle jets to counter the natural effects of atmospheric drag on the station's orbit.

All systems on both Endeavour and the International Space Station continue to function normally as the two craft orbit the Earth every 90 minutes at an altitude of 240 statute miles.

Working side by side, the Endeavour crew - Ken Cockrell, Paul Lockhart, Franklin Chang-Díaz, Philippe Perrin, Yury Onufrienko, Carl Walz and Dan Bursch - and the Expedition Five crew of Valery Korzun, Peggy Whitson and Sergei Treschev have transferred approximately 4,500 of the expected 4,665 pounds of material that will return to Earth inside the MPLM. All of the items slated to be moved from Endeavour's middeck to the station have been transferred and the astronauts are now restowing return items.

Also today, Endeavour's small steering jets were fired in a series of pulses to gently raise the station's orbit by another mile. This was the second of three scheduled reboost maneuvers designed to raise the station's altitude by a total of six miles.

The crewmembers also reviewed the plans for the third and final scheduled spacewalk of the mission. Thursday morning, at 9:43 a.m. Central, Chang-Díaz and Perrin will float out of the Quest airlock and begin work to replace a faulty wrist-roll joint on the space station's robotic arm, Canadarm2. The spacewalk is slated to last about seven hours.

This afternoon, the crews took a break from the stowage activities to discuss the progress of their mission with reporters in the U.S., France and Canada during a joint crew news conference.

Endeavour's payload bay cameras captured views of wildfires burning in Colorado about 4:40 p.m Central today. Smoke rising from the wildfires was clearly visible as the shuttle/station complex orbited 240 miles over the surface of the Earth.

The two crews are scheduled to go to sleep just before 8 p.m. today and will awaken just before 4 a.m. Thursday. All systems on both Endeavour and the International Space Station continue to function normally as the two craft orbit the Earth every 90 minutes at an altitude of 240 statute miles.

With Endeavour Pilot Paul Lockhart choreographing the spacewalk from inside Endeavour, Chang-Díaz and Perrin stepped outside the station's Quest airlock at 10:16 a.m. Central time. Commander Ken Cockrell used the shuttle's robotic arm to provide television views of the spacewalk activity.

Chang-Díaz and Perrin first removed the arm's latching end effector, essentially the hand of Canadarm2, and attached it to a handrail on the station's Destiny Laboratory. Next they released six bolts connecting the wrist roll joint to the adjoining yaw joint and an additional bolt connecting power, data and video umbilicals. Perrin carried the failed unit to Endeavour's payload bay where it was temporarily stored near the new joint.

Perrin released six fasteners to remove the new joint from its launch carrier in the shuttle cargo bay and brought it up to Canadarm2 where Chang-Díaz was positioned. After aligning the new component with the wrist yaw joint at the end of the arm, the duo tightened the six bolts to secure the new joint to the arm and turned the final bolt to connect the power, data and video lines. After they reinstalled the latching end effector, power was turned back on to Canadarm2. The failed joint was then placed in a flight support structure in the cargo bay for return to Earth.

Working at the robotics workstation inside the Destiny Laboratory, Endeavour Astronaut Dan Bursch and Expedition Five Commander Valery Korzun conducted a checkout of the health of the arm once the new joint was installed. At 3:43 p.m. Central time, the arm returned to full operational status.

Following an inventory of the tools they used during the spacewalk, Perrin and Chang-Díaz re-entered Quest. Airlock repressurization began at 5:33 p.m. Central time, signaling the end of the spacewalk. It was the 41st spacewalk in support of ISS assembly and maintenance and the third of the mission, bringing the total spacewalking time for STS-111 to 19 hours and 31 minutes.

Canadarm2 experienced an electrical problem in March in one of two redundant power and data channels which command the operation of the seven-jointed apparatus. It was determined that a short created inadvertent commanding in the arm's primary channel which resulted in the unexpected activation of the arm's brakes. The backup commanding channel has functioned perfectly. Even though the arm has continued to operate flawlessly through a software modification, the replacement of the problematic wrist joint was added to the STS-111 mission.

Inside the shuttle, Pilot Paul Lockhart will choreograph the planned seven-hour spacewalk while Commander Ken Cockrell will use the shuttle's robotic arm to provide television views of the spacewalk activity. Inside the station, Endeavour Astronaut Dan Bursch and Expedition Five Commander Valery Korzun will conduct a checkout of the health of the arm once the new joint is installed. Expedition Five Flight Engineers Peggy Whitson and Sergei Treschev will continue cargo transfer activities throughout the day.

Each joint of Canadarm2 is attached to the next joint by six bolts and an additional bolt that disconnects power, data and video connections. The first task for the spacewalkers is to remove the latching end effector (LEE), essentially the hand of Canadarm2, leaving the faulty wrist roll joint exposed. Next they will disconnect the wrist roll joint and Perrin will carry the failed unit to Endeavour's payload bay to temporarily store it next to the new joint. Chang-Díaz will assist in removing the new joint from its launch carrier and Perrin will bring it up to Canadarm2. The spacewalkers will align the new component with the wrist yaw joint at the end of the arm, tighten the six bolts and turn the final bolt to connect power, data and video lines. They will reinstall the LEE and power will be turned back onto Canadarm2.

Endeavour's astronauts - Cockrell, Lockhart, Chang-Díaz, Perrin, Bursch, Yury Onufrienko and Carl Walz - were awakened just before 4 a.m. Central time this morning to the song, "On the Road Again," by Willie Nelson, selected for Walz by his family. Walz is returning to Earth after a six-month stay in orbit.

All systems on both Endeavour and the International Space Station continue to function normally as the two craft orbit the Earth every 90 minutes at an altitude of 240 statute miles.

Working with the International Space Station's Expedition Five crew, Commander Valery Korzun and Flight Engineers Peggy Whitson and Sergei Treschev, Endeavour's astronauts will deactivate the Leonardo Multi-Purpose Logistics Module and will remove it from its location on the Unity node of the International Space Station. Using the shuttle's robotic arm, Cockrell will place the module back into Endeavour's cargo bay for its return to Earth.

About 5,600 pounds of equipment and supplies are being left behind on the ISS, including a new phone booth-sized rack to house delicate microgravity experiments and a glovebox to provide the Expedition Five crew future hands-on interaction with contained experiments. The cargo module is returning with 4,665 pounds of discarded equipment and supplies to Earth.

Last night, an initial attempt to provide power from the newly installed Mobile Base System platform to the space station robotic arm, Canadarm2, was not successful. Engineers believe that a minor software glitch is preventing commanding from the platform to reach the newly refurbished robotic arm so that the new platform, rather than the Destiny Laboratory, can provide power for the arm. This is not believed to be a serious problem, and should be corrected well before the arm "walks off" its base location on the Destiny to use the Mobile Base System as its formal platform for a ride down the length of the station's truss structure. Canadarm2 received a new wrist roll joint yesterday during the final spacewalk of the flight by Chang-Díaz and Perrin, and the arm itself has full functionality and redundancy.

Endeavour's steering jets are being used to raise the station's altitude a third and final time today prior to tomorrow's scheduled undocking. The three maneuvers are expected to raise the altitude of the ISS by around six statute miles.

Endeavour is scheduled to undock from the ISS Saturday morning at 9:32 a.m. Central time while the two spacecraft fly over western Kazakhstan, not far from Russia's primary launch site at the Baikonur Cosmodrome. Once Endeavour departs, ISS residents Korzun, Whitson and Treschev will begin their 4 ½ month mission in earnest, unpacking gear and settling in to their new home in orbit.

All systems on both Endeavour and the International Space Station continue to function normally as the two craft orbit the Earth every 90 minutes at an altitude of 240 statute miles. Endeavour is scheduled to undock from the space station Saturday morning.

Endeavour astronaut Philippe Perrin completed the last major task of the STS-111 mission today when he successfully returned the Leonardo Multi-Purpose Logistics Module to the shuttle's payload bay at 3:11 p.m. Central.

Leonardo brought a total of 8,062 pounds of supplies and equipment to the space station, including a new science rack to house microgravity experiments and a glovebox that will allow station crews to conduct experiments that require isolation. More than 1,000 pounds of equipment was also brought to the station on Endeavour's middeck.

In addition to carrying home the results of several science experiments, Leonardo is returning to Earth with 4,667 pounds of equipment and supplies that are no longer needed aboard the station. More than 1,000 pounds of equipment also will be returned to Earth in Endeavour's middeck.

Endeavour's steering jets were used today to raise the station's altitude by an additional four miles, the third and final reboost of the mission. Together, the three reboosts raised the altitude of the station by approximately six miles.

Early Saturday morning, about 6:30 central time, following final goodbyes, the hatches between the two spacecraft will swing shut. About three hours later, the crew of Endeavour - Ken Cockrell, Paul Lockhart, Franklin Chang-Díaz, Perrin, Dan Bursch, Yury Onufrienko and Carl Walz - will depart the space station, leaving the Expedition Five crew - Commander Valery Korzun and Flight Engineers Peggy Whitson and Sergei Treschev - to begin their 4½ -month mission of continued station growth and scientific research.

All systems on both Endeavour and the International Space Station continue to function normally as the two craft orbit the Earth every 90 minutes at an altitude of 240 statute miles.

After final farewells and the closing of the hatches between the two vehicles, Endeavour will undock from the ISS at 9:32 a.m. Central time as the two craft fly over western Kazakhstan, not far from Russia's primary launch site at the Baikonur Cosmodrome.

The initial separation will be provided by springs that will gently push the shuttle away from the station. When Endeavour is about two feet away from the station and the docking devices are clear of one another, Pilot Paul Lockhart will fire Endeavour's steering jets to begin slowly moving away.

About 45 minutes after undocking, when Endeavour is 450 feet in front of the ISS, Lockhart will begin a one-hour flyaround of the station. After 1 1/4 laps of the complex, Lockhart will fire Endeavour's jets to move away from the station about 11:16 a.m. Once Endeavour departs the outpost for the final time, the new ISS crew will begin to unpack gear and prepare for its long duration stay on orbit.

Endeavour's astronauts - Lockhart, Chang-Diaz, Commander Ken Cockrell, Philippe Perrin, Dan Bursch, Yury Onufrienko and Carl Walz - were awakened just before 3:30 Central time this morning to the song, "Hello to All the Children of the World", prepared for Bursch by his son's classmates.

Endeavour is scheduled to land at the Kennedy Space Center just before noon Central time Monday, bringing Onufrienko, Bursch and Walz home after 194 days in space, which for Walz and Bursch will set a new U.S. single spaceflight endurance mark. Landing Monday will result in one more day in space for Onufrienko than he logged in 1996 as Commander of the former Russian Mir Space Station.

Endeavour and the ISS to continue to function normally as they orbit at an altitude of around 240 statute miles.

After final farewells among the STS-111 and Expedition Four and Five crews, the hatches between the spacecraft were closed at 7:23 a.m. Central today. Following a series of pressure and leak checks, Endeavour gently undocked from the Station at 9:32 a.m. as the two spacecraft flew over western Kazakhstan.

As Endeavour departed the station, Whitson rang the ship's bell on board, announcing "Expedition Four departing, Endeavour departing." Dan Bursch, who along with Yury Onufrienko and Carl Walz, spent 181 days aboard the station, responded with "smooth sailing, Peggy." After a 1 ¼ lap flyaround of the station, Pilot Paul Lockhart fired a final separation burn of Endeavour's engines at 11:15 a.m. and began its final departure from the station. The two spacecraft are now about 315 miles apart, with the gap widening by 40 miles every orbit.

Both crews will enjoy some well-deserved time off today to relax following a busy week of joint operations. Endeavour's crew will go to sleep at 7:23 p.m. today, waking at 3:23 a.m. Sunday. The Expedition Five crew began an extended sleep period about 3 p.m., shifting over to its standard daily wakeup time of 1 a.m. on Sunday.

The focus of activities aboard Endeavour on Sunday will include a checkout of the systems that will be used during Monday's planned landing at the Kennedy Space Center. Endeavour is scheduled to land at the Kennedy Space Center just before noon Central time Monday, bringing Onufrienko, Bursch and Walz home after 194 days in space.

Aboard the station, Korzun, Whitson and Treschev will begin unpacking some of the supplies and equipment transferred from Endeavour and set up house for their planned 4 ½ month stay on the station. They are scheduled for about four hours of off-duty time Sunday.

Commander Ken Cockrell, Pilot Paul Lockhart, Mission Specialists Franklin Chang-Diaz and Philippe Perrin, and returning Expedition 4 crewmembers Yury Onufrienko, Carl Walz and Dan Bursch were awakened at 3:23 a.m. to "Where My Heart Will Take Me," the theme song from Star Trek: Enterprise, performed by Russell Watson.

Today, Cockrell, Lockhart and Chang-Diaz will test the reaction control system jets and flight control surfaces that will be used to guide Endeavour through the atmosphere Monday morning. Onufrienko, Walz, Bursch and Perrin will install their seats for re-entry on Endeavour's middeck. Perrin will help the Expedition 4 crewmembers into their seats Monday. Endeavour is scheduled to land at Kennedy Space Center in Florida Monday at 11:59 a.m. CDT.

Onufrienko, Walz and Bursch are coming back to Earth after 181 days aboard the International Space Station. If Endeavour lands on time, Walz and Bursch will set a new record of U.S. spaceflight endurance with 194 days in orbit. Astronaut Shannon Lucid held the previous record of 188 days, set on her mission to Mir in 1996.

The Expedition 4 crew will talk with media representatives from the Fox News Network and TV stations in Ohio and New York in a news conference beginning at 12:38 p.m.

Cockrell and Lockhart will fire Endeavour's orbital maneuvering system engines for 10 seconds today to allow sensors to observe the plume created by the burn to help improve models on the ground.

On board the space station, the Expedition 5 crew - Commander Valery Korzun and Flight Engineers Peggy Whitson and Sergei Treschev - was awakened at 1 a.m. The crew is unpacking and settling into its new home, preparing for a 41/2-month stay in orbit.

The crew of Endeavour will begin a scheduled eight-hour sleep period at 7:23 p.m. today. They are to be awakened just before 3:30 a.m. Monday to prepare for re-entry and landing of Endeavour, concluding a successful mission to the station.

Today, Commander Ken Cockrell, Pilot Paul Lockhart and Flight Engineer Franklin Chang-Diaz activated one of three hydraulic power units on Endeavour, tested all of its aerosurfaces, and then test-fired Endeavour's steering jets. The remaining crew members - Philippe Perrin of CNES, and former Expedition Four crewmembers Yury Onufrienko, Carl Walz and Dan Bursch - continued packing up gear and hardware in anticipation of tomorrow's landing.

Endeavour has two opportunities to land at the Kennedy Space Center on Monday. The first begins with a deorbit burn of the Orbital Maneuvering System engines at 10:51 a.m., followed by a landing at 11:59 a.m. Central time (12:59 p.m. Eastern.) In the event weather prevents a landing on that first opportunity, there is a second opportunity, beginning with a deorbit burn at 12:30 p.m. and resulting in a 1:36 p.m. Central (2:36 p.m. Eastern) landing in Florida. Preliminary weather forecasts call for the possibility of clouds and rain showers within the vicinity of the three-mile long landing strip on Monday. The backup landing site at California's Edwards Air Force Base was not called up for support Monday. Endeavour has sufficient consumables to remain in orbit, if necessary, until Thursday.

Onufrienko, Bursch and Walz took a few minutes this afternoon to talk with Fox News, WOIO-TV of Cleveland - Walz' hometown, and WICZ-TV of Vestal, NY - Bursch's hometown. The crew extended their best wishes on this Father's Day and discussed their 193-day stay in space. With an on-time landing Monday, Onufrienko, Bursch and Walz will have spent 194 days in space.

Meanwhile, aboard the space station, the Expedition Five crew - Commander Valery Korzun and Flight Engineers Peggy Whitson and Sergei Treschev - spent today settling into their new home, unpacking some of the equipment and hardware carried to the station by Endeavour. They also enjoyed a few hours of off-duty time today.

Endeavour's crew will begin a scheduled eight-hour sleep period at 7:23 p.m. today, waking just before 3:30 a.m. Monday to prepare for a homecoming to the Kennedy Space Center.

Endeavour completed all major objectives of its STS-111 flight. Expedition 5 crewmembers were taken to the station while Expedition 4 crewmembers are coming home. Tons of equipment and supplies were transferred between the two spacecraft and three spacewalks replaced the wrist roll joint of the station's robotic arm, Canadarm2, and gave the arm a mobile base for future station assembly and maintenance work.

Endeavour has two landing opportunities at KSC today. The first begins with the firing of Endeavour's braking rockets at 10:51 a.m. and a landing at 11:59 a.m. CDT. A second opportunity for a Florida landing would see the deorbit burn at 12:30 p.m. and a landing at KSC at 1:36 p.m. CDT. Preliminary weather forecasts call for the possibility of clouds and rain showers in the area of the three-mile-long landing strip on Monday. The backup landing site at California's Edwards Air Force Base was not activated today. Endeavour has enough consumables to stay in orbit until Thursday.

Endeavour Commander Ken Cockrell, Pilot Paul Lockhart, and Mission Specialists Philippe Perrin and Franklin Chang-Diaz, and Expedition 4 crewmembers Yury Onufrienko, Carl Walz and Dan Bursch were awakened at 3:23 a.m. by the "The Eyes of Texas," performed by the University of Texas Marching Band. Cockrell and Lockhart hold degrees from that university.

Meanwhile, aboard the ISS, the Expedition 5 crew - Commander Valery Korzun and Flight Engineers Peggy Whitson and Sergei Treschev - is still settling into its new home, unpacking the supplies and equipment delivered by Endeavour to the station.

Endeavour crewmembers, Commander Ken Cockrell, Pilot Paul Lockhart, and Mission Specialists Philippe Perrin and Franklin Chang-Diaz, and Expedition 4's Yury Onufrienko, Carl Walz and Dan Bursch, were given the word to back out of deorbit preparations about 10:30 a.m. today.

Endeavour has two landing opportunities at KSC Tuesday. The first begins with the firing of Endeavour's braking rockets at 9:47 a.m. and a landing at 10:55 a.m. CDT. A second opportunity for a Florida landing would see the deorbit burn at 11:24 a.m. and a landing at KSC at 12:31 p.m. CDT. Preliminary weather forecasts call for the possibility of clouds and rain showers in the area of the three-mile landing strip on Tuesday.

The Edwards Air Force Base landing site will be activated Tuesday, though KSC remains the preferred landing location. Forecasts for both KSC and Edwards called for questionable weather that could prevent a Tuesday landing. Endeavour has enough consumables on board to remain in orbit until Thursday.

The first of two Tuesday opportunities to land at Edwards would see a deorbit burn at 12:54 p.m. and a landing at 2 p.m. CDT. For the second opportunity, the deorbit burn would begin at 2:32 p.m. with a landing at 3:36 p.m. CDT.

Endeavour completed all major objectives of its STS-111 flight. It rotated station crews, brought more than 9,000 pounds of equipment and supplies to the station, and in three successful spacewalks gave the station's robotic arm, Canadarm2, a mobile base for future station assembly and maintenance work, and replaced its wrist-roll joint.

Crewmembers aboard Endeavour were scheduled to begin a sleep period at 6:23 p.m. and be awakened at 2:23 a.m. Tuesday.

Meanwhile, the ISS Expedition 5 crew - Commander Valery Korzun and Flight Engineers Peggy Whitson and Sergei Treschev - is still unpacking the supplies and equipment delivered by Endeavour to the station.

Houston's Mission Control Center told Endeavour crewmembers, Commander Ken Cockrell, Pilot Paul Lockhart, and Mission Specialists Philippe Perrin and Franklin Chang-Diaz, and Expedition 4's Yury Onufrienko, Carl Walz and Dan Bursch, of the second of two wave offs about 9:35 a.m.

Similar inclement weather on Monday resulted in a wave-off of those landing opportunities. Wednesday offers two landing opportunities at KSC and three at Edwards Air Force Base in California. Forecasters are predicting improving weather at both sites. Endeavour has enough consumables on board to remain in orbit until Thursday, if necessary.

The first of the KSC landing attempts would begin with a deorbit burn at 8:44 a.m. and a landing at 9:53 a.m. CDT (10:53 a.m. eastern.) A second opportunity for a Florida landing would see the deorbit burn at 10:19 a.m. and a landing at KSC at 11:27 a.m. CDT (12:27 p.m. eastern.)

The first of the three subsequent opportunities at Edwards would begin with a deorbit burn at 11:50 a.m. and a landing at 12:58 p.m. CDT. The deorbit burn for the second attempt would be at 1:27 p.m. and a landing at 2:33 p.m. CDT. The third opportunity would see a deorbit burn at 3:06 p.m. and a landing at 4:11 p.m. CDT.

Crewmembers aboard Endeavour are scheduled to begin a sleep period at 5:23 p.m. and be awakened at 1:23 a.m. Wednesday.

All continues to go smoothly aboard the International Space Station in the early days of Expedition 5's residency. Commander Valery Korzun, and Flight Engineers Peggy Whitson and Sergei Treschev, are still unpacking the supplies and equipment delivered by Endeavour.

Rain and thundershowers in the area of the Kennedy Space Center landing site in Florida caused flight controllers to wave off both of Monday's opportunities to bring Endeavour home.

Endeavour crewmembers, Commander Ken Cockrell, Pilot Paul Lockhart, and Mission Specialists Philippe Perrin and Franklin Chang-Diaz, and Expedition 4's Yury Onufrienko, Carl Walz and Dan Bursch, have two landing opportunities at KSC today. The first begins with the firing of Endeavour's braking rockets at 9:47 a.m. and a landing at 10:55 a.m. CDT. A second opportunity for a Florida landing would see the deorbit burn at 11:24 a.m. and a landing at KSC at 12:31 p.m. CDT.

The Edwards Air Force Base landing site in California will be activated today, though KSC remains the preferred landing location. The first of two opportunities to land at Edwards would see a deorbit burn at 12:54 p.m. and a landing at 2:02 p.m. CDT. For the second opportunity, the deorbit burn would begin at 2:32 p.m. with a landing at 3:38 p.m. CDT.

Preliminary forecasts for both KSC and Edwards call for a chance of showers and thunderstorms in Florida and gusty winds in California that could prevent a Tuesday landing. Endeavour has enough consumables on board to remain in orbit until Thursday.

Endeavour's crew completed all major objectives of its STS-111 flight. It rotated station crews, brought more than 9,000 pounds of equipment and supplies to the station, and in three successful spacewalks gave the station's robotic arm, Canadarm2, a mobile base for future station assembly and maintenance work, and replaced its wrist-roll joint.

Meanwhile, the ISS Expedition 5 crew - Commander Valery Korzun and Flight Engineers Peggy Whitson and Sergei Treschev - is still unpacking the supplies and equipment delivered by Endeavour to the station and familiarizing themselves with their new home.

For a second day, rain, thundershowers and clouds around the Kennedy Space Center in Florida caused flight controllers to wave off Tuesday's opportunities to bring Endeavour and its crew home.

Similar weather Monday resulted in a wave-off of those landing opportunities. Wednesday offers two landing opportunities at KSC and three at Edwards Air Force Base in California. Forecasters are predicting improving weather at both sites. Endeavour has enough consumables on board to remain in orbit until Thursday.

The first of the KSC landing attempts would begin with a deorbit burn at 8:44 a.m. and a landing at 9:53 a.m. CDT (10:53 a.m. EDT.) A second opportunity for a Florida landing would see the deorbit burn at 10:19 a.m. and a landing at 11:27 a.m. CDT (12:27 p.m. EDT.)

The first of the three subsequent opportunities at Edwards would begin with a deorbit burn at 11:50 a.m. and a landing at 12:58 p.m. CDT (10:58 a.m. PDT). The deorbit burn for the second attempt would be at 1:27 p.m. and a landing at 2:33 p.m. CDT (12:33 p.m. PDT). The third opportunity would see a deorbit burn at 3:06 p.m. and a landing at 4:11 p.m. CDT (2:11 p.m. PDT).

All continues to go smoothly aboard the International Space Station in the early days of Expedition 5's residency. Commander Valery Korzun, and Flight Engineers Peggy Whitson and Sergei Treschev are activating equipment, initiating scientific experiments and getting used to the space station environment and routines.

The week started out with Expedition 5 Commander Valery Korzun, NASA ISS Science Officer Peggy Whitson and Flight Engineer Sergei Treschev making sure station systems are ready to support installation of the next piece of the orbiting outpost's truss structure. They performed a final checkout of the Mobile Transporter, Canadarm2, the Quest airlock, and the spacewalk tools and equipment that already are on board. After those activities were complete, they began pre-packing items that will come home with them aboard Endeavour, which is set to launch with a replacement crew between 11 p.m. Sunday and 3 a.m. Monday CST.

Once the Port One (P1)1 truss is installed, the Expedition 5 crew will hand over control of the station to Expedition 6 Commander Ken Bowersox and Flight Engineers Nikolai Budarin and Don Pettit and return home with Endeavour's crew - Commander Jim Wetherbee, Pilot Paul Lockhart and Mission Specialists Mike Lopez-Alegria and John Herrington.

The visiting taxi crew - Commander Sergei Zalyotin, European Space Agency Flight Engineer Frank DeWinne from Belgium and Russian Flight Engineer Yuri Lonchakov - will undock from the station at 2:41 p.m. CST on Saturday. Zalyotin will fire the Soyuz deorbit engines at 5:10 p.m., bringing his crew in for a landing on the Kazakh steppes at 6:04 p.m.

The taxi crew, which rode into orbit aboard an upgraded Soyuz TMA capsule with more legroom and more modern cockpit controls, displays and computers, will ride home in the older Soyuz TM-34 return vehicle that has been at the station since April. A fresh Soyuz is delivered to the ISS every six months to provide an assured return capability for station residents in the unlikely event they would need to come home early.

During their eight-day stay on the station, the taxi crew conducted a host of medical, protein crystal growth and materials processing experiments. With DeWinne leading the investigations, the crew looked at human physiology in microgravity and how crystals grow and alloys form inside the Microgravity Science Glovebox in the Destiny Laboratory module.

Flight controllers in Houston are troubleshooting with the Carbon Dioxide Removal Assembly in the Destiny lab. CDRA is a system of absorption beds, tubing and valves that remove excess carbon dioxide from the atmosphere after it is expelled during breathing and vents it overboard. Two of six valves appear to be malfunctioning, causing the system to shut down several hours after it is started. The system supplements the station's Russian Vozdukh carbon dioxide removal system when more than three crewmembers are on board.

Troubleshooters have confirmed that a recent lab systems software update is not the cause of the problems, and they are refining their activation procedures to try to support the upcoming shuttle and Expedition 6 crews with CDRA using additional ground commanding. Lithium hydroxide canisters, which absorb carbon dioxide through a chemical process, may also be used to supplement the primary system; one canister was used during some of the CDRA troubleshooting activities.

The Elektron unit that generates oxygen by separating the oxygen and hydrogen atoms from water molecules also is not working properly. Korzun and Treschev conducted troubleshooting activities this week and are scheduled to replace the unit's liquid electrolysis module on Sunday. Additional oxygen is available in the Progress vehicle docked to the aft end of Zvezda. Oxygen and nitrogen also are available in tanks attached to the Quest airlock. Oxygen also is available from Russian oxygen generating "candles."

Saturday's departure of the taxi crew will set the stage for the launch of the shuttle Endeavour. The crew arrived at the Kennedy Space Center last night, and the launch countdown began today. Endeavour will take the 1 truss structure and additional resupply items, as well as two replacement valves for the station's CDRA system to the ISS. The three-pound aluminum replacement valves are about 5 by 9 by 6 inches, and look like valves in a home air conditioning system.

On board the International Space Station, the current residents - Expedition Five Commander Valery Korzun, NASA ISS Science Officer Peggy Whitson and Flight Engineer Sergei Treschev - were told of Endeavour's on-time liftoff by spacecraft communicator Stan Love in the space station control center.

"Thanks so much for the play-by-play Stan. That was great," Whitson said in response to the news that the Expedition Six crew - Commander Ken Bowersox and Flight Engineers Nikolai Budarin and Don Pettit - were en route.

Once on orbit, Commander Jim Wetherbee, Pilot Paul Lockhart and Mission Specialists Mike Lopez-Alegria and John Herrington, along with Bowersox, Budarin and Pettit will begin setting up equipment on board and preparing to open the shuttle's payload bay doors to begin orbital operations.

Endeavour is scheduled to dock to the station about 3:30 p.m. central time Monday, setting the stage for Tuesday's installation of the Port One (P1) truss to the International Space Station. As was the case during Atlantis' flight last month to deliver the Starboard One truss segment, three spacewalks will be conducted by Lopez-Alegria and Herrington to help activate the new truss' systems. P1 is the third truss segment to be launched this year. It is one of 11 truss segments that will form the structural backbone for the station and provide the cooling and support for new solar arrays to be delivered to the station next year.

Endeavour's crew will go to sleep just before 1 a.m. Sunday and will be awakened just before 9 a.m. to begin its first full day in orbit. The crew will begin check-outs of the Shuttle's robot arm, the spacesuits to be worn by Lopez-Alegria and Herrington during their spacewalks and the tools and mechanisms involved in Monday's rendezvous with the ISS.

Onboard the station, the Expedition Five crew, Commander Valery Korzun, NASA ISS Science Officer Peggy Whitson and Flight Engineer Sergei Treschev, awakened at 7:45 a.m. to continue preparations for the arrival of Endeavour, and their replacement crew.

In preparation for Monday's docking, Endeavour's crew - Commander Jim Wetherbee, Pilot Paul Lockhart, Mission Specialists Mike Lopez-Alegria and John Herrington, and the Expedition Six crew Commander Ken Bowersox, NASA ISS science officer Don Pettit and flight engineer Nikolai Budarin - will verify operation of the equipment used during docking. The centerline camera will be installed in the docking system, the orbiter docking system ring will be extended and a variety of handheld cameras and distance-measuring devices will be checked out. In addition, Lopez-Alegria and Herrington will inspect and checkout the spacesuits they will wear during three scheduled spacewalks to install and outfit the P1 truss segment.

Monday's docking to the International Space Station is scheduled to occur about 3:26 p.m. central time and sets the stage for those three spacewalks to be conducted over a period of five days. The P1 truss is the third such segment to be launched this year, one of 11 truss segments that will form the structural backbone of the station. The trusses will also provide cooling and support for new solar arrays, which will be delivered to the station next year.

At 6:55 p.m., Bowersox, Budarin and Pettit will talk with reporters from USA Today and AP Radio News. The trio will become the sixth resident crew to live and work in space aboard the International Space Station, replacing the current Expedition Five residents who are beginning their 173rd day in space today.

In preparation for Monday's docking, Endeavour's crew - Commander Jim Wetherbee, Pilot Paul Lockhart, Mission Specialists Mike Lopez-Alegria and John Herrington, and the Expedition Six crew Commander Ken Bowersox, NASA ISS Science Officer Don Pettit and flight engineer Nikolai Budarin - verified operation of the equipment used to support a smooth rendezvous and soft docking. A camera was installed to give Wetherbee a view of the station's docking port through the shuttle's docking system, a shock-absorbing ring that will make the first contact was extended and a variety of handheld cameras and distance-measuring devices were checked out. In addition, Lopez-Alegria and Herrington inspected and checked out the spacesuits being delivered to the station for use on three spacewalks to install and outfit the P1 truss segment.

Checkout of the shuttle's Remote Manipulator System went smoothly today, but the robotic arm camera survey of Endeavour's payload bay ran a little longer than expected. The robotic arm's wrist roll joint was commanded in extra maneuvers to help work in lubrication that was applied during the arm's preflight servicing. The robotic arm is ready to support operations to remove Endeavour's primary cargo, the P1 or port truss, from the payload bay on Tuesday.

Also today, Bowersox, Budarin and Pettit spoke with reporters from USA Today and AP Radio News. The trio will become the sixth resident crew to live and work in space aboard the International Space Station, replacing the current Expedition Five residents.

Onboard the station, the Expedition Five crew, Commander Valery Korzun, NASA ISS Science Officer Peggy Whitson and Flight Engineer Sergei Treschev, continued preparations for the arrival of Endeavour, and their replacement crew.

Endeavour's crew is scheduled to go to sleep about 11:20 p.m. Central time and awaken about 7:20 a.m. Monday.

Onboard the space station, the Expedition Five crew - Commander Valery Korzun, NASA ISS Science Officer Peggy Whitson and Flight Engineer Sergei Treschev - awakened at 7:50 a.m. to continue preparations for the arrival of their latest guests, including their replacement crew.

After hatch opening and a safety briefing conducted by Korzun, the two crews will begin transferring supplies and equipment that will be needed during the three upcoming spacewalks, as well as the Expedition Six seat liners and reentry suits for the Soyuz spacecraft. The Soyuz serves as a lifeboat for the station, enabling a crew to come home quickly in the event of an emergency. Each crewmember has their own custom-fitted seat liner to cushion the effects of a Soyuz landing. The official exchange of resident crews aboard the station will be complete once the Expedition Six crew has transferred its seatliners to the Soyuz spacecraft and the Expedition Five crew transfers its seatliners over to Endeavour for the return trip home.

Over the next seven days, the astronauts and cosmonauts will work together to attach another truss to the space station, the Port 1 (P1) truss, and complete the changeover between the Expedition Five and Six crews. The first of three spacewalks to install and outfit the truss is scheduled for Tuesday afternoon, to be conducted by Mission Specialists Mike Lopez-Alegria and John Herrington.

Endeavour's crew - Commander Jim Wetherbee, Pilot Paul Lockhart, Mission Specialists Lopez-Alegria and Herrington, and the Expedition Six crew Commander Ken Bowersox, NASA ISS Science Officer Don Pettit and Flight Engineer Nikolai Budarin - will begin rendezvous operations around 10:35 a.m. The final approach phase of the docking is scheduled to begin about 1 p.m. with hatch opening between the two spacecraft scheduled to occur at 4:45 p.m.

The rendezvous and docking of Endeavour with shuttle Commander Jim Wetherbee at the controls went smoothly. Docking occurred about 248 statute miles above the South Pacific off the southeastern coast of Australia.

After successful leak checks, the last hatch between the two spacecraft was opened at 5:31 p.m. The Expedition 5 crew - Commander Valery Korzun, NASA ISS Science Officer Peggy Whitson and Flight Engineer Sergei Treschev - welcomed the new arrivals to the orbiting laboratory to begin a week of docked operations. After greetings, the first item on the agenda was a safety briefing by Korzun.

Expedition 6 Commander Ken Bowersox, NASA ISS Science Officer Don Pettit and Flight Engineer Nikolai Budarin later installed their custom seatliners in the Soyuz spacecraft that could serve as a return vehicle in the unlikely event it became necessary to leave the station unexpectedly. Their call saying they had completed the installation and pressure checks of the Russian SOKOL re-entry suits made them station crewmembers. It also officially ended the Expedition 5 increment, after 171 days, 3 hours and 33 minutes.

Expedition 5 was launched last June 5 and has been on the station since June 7. The trio will return to Earth with the Endeavour crew, Wetherbee, Pilot Paul Lockhart, Mission Specialists Michael Lopez-Alegria and John Herrington.

During the week together at the station, Expedition 5 crewmembers will conduct extensive briefings for their successors, familiarizing them with their new home and the location and function of its equipment and experiments. They also will brief the Expedition 6 crew on the inventory and location of supplies aboard the station.

On Tuesday the shuttle and station crews will lift the new P1 truss segment from Endeavour's cargo bay with the shuttle's robotic arm, operated by Wetherbee. He will hand the P1 off to the Canadarm2, the station's arm, which Bowersox and Whitson will use to position it for installation.

Once remotely operated bolts have secured P1 to the S0 truss center, Lopez-Alegria and Herrington will begin the first of three spacewalks to make electrical, fluid and data connections between it and the rest of the station and to outfit the new truss segment.

Subsequent spacewalks will be made Thursday and Saturday. Each of the three spacewalks will be about 61/2 hours long.

P1 was removed from Endeavour's payload bay at 9:22 a.m. CST by the shuttle's robotic arm, operated by Commander Jim Wetherbee. He handed it off to the station's Canadarm2, operated by Expedition 6 commander Ken Bowersox and Expedition 5 NASA ISS Science Officer Peggy Whitson, and released the shuttle arm's grip on P1 a little before 11 a.m. Whitson and Bowersox maneuvered the 14-ton, 45-foot truss segment to its installation position.

P1 is the third segment of the Integrated Truss Structure to be installed this year. A fourth segment, the P6 truss, supports the 240-foot-long solar arrays atop the station. It was installed there in December 2000 and will be moved later to the left end of the station's backbone. At completion, the integrated truss will consist of 11 segments stretching the length of a football field.

The spacewalk began at 1:49 p.m., about 30 minutes earlier than planned, after the four bolts securing the P1 to the S0 truss centerpiece had been driven home by remote commands. The spacewalk ended a little before 8:35 p.m. for a total time of 6 hours and 45 minutes.

Herrington and Lopez-Alegria hooked up electrical connections between P1 and the station, installed spool positioning devices designed to ensure that quick disconnect devices in fluid lines will function properly, and released launch locks securing the Crew and Equipment Translation Aid (CETA) cart, a kind of hand car for the truss railway. The two spacewalkers also removed two drag links, large metal rods that had supported P1 during launch, and stowed them in the P1 framework. Finally, after Herrington had topped off his oxygen supply in the airlock, they installed Node Wireless video system External Transceiver Assembly (WETA) antennas allowing reception from spacewalkers' helmet cameras without a shuttle present.

Endeavour Pilot Paul Lockhart, with help from Bowersox and Expedition 6 Science Officer Don Pettit, served as intravehicular officer during the spacewalk, coaching Lopez-Alegria and Herrington through their tasks and keeping them on the timeline.

The spacewalk was the 22nd station-based spacewalk, and brought the total time for space station spacewalks to 292 hours, 10 minutes. There have been 25 shuttle-based assembly spacewalks.

Lopez-Alegria, wearing the spacesuit with red stripes, and Herrington, in the all-white spacesuit, will conduct two more spacewalks, each scheduled for 61/2 hours, on Thursday and Saturday. Both will focus on making additional connections between the new truss segment and the station, and outfitting the P1.

Expedition 5 Commander Valery Korzun, Whitson and Flight Engineer Sergei Treschev conducted handover discussions with their Expedition 6 successors, Bowersox, Pettit and Flight Engineer Nikolai Budarin, during parts of the Tuesday spacewalk.

Beginning around 9:20 a.m., Endeavour Commander Jim Wetherbee will use the shuttle's robotic arm to lift the P1 truss from the cargo bay, then hand it off to the station's robotic arm. Expedition Six Commander Ken Bowersox and Expedition Five NASA ISS Science Officer Peggy Whitson will fly the station's robotic arm. Bowersox and Whitson will position the P1 for installation around 1 p.m.

About 2:20 p.m., after remotely-operated bolts have secured the P1 truss to the station's central Starboard Zero (S0) truss segment. Mission Specialists Michael Lopez-Alegria and John Herrington will exit the station's Quest airlock to begin the first of the mission's three spacewalks. Lopez-Alegria will start by making connections between the P1 and the S0 while Herrington releases launch restraints on the Crew and Equipment Translation Aid cart. Lopez-Alegria also will install Spool Positioning Devices onto the station. Both spacewalkers will then remove a drag link on the P1 that served as a launch restraint.

The final major task of the 61/2-hour spacewalk is the installation by both spacewalkers of a Wireless video system External Transceiver Assembly (WETA) onto the Unity module. The WETA will be used to support helmet camera communications from future spacewalkers.

Endeavour Pilot Paul Lockhart will coordinate the spacewalk from the flight deck of the shuttle. During the spacewalk, the Expedition Five crew - Commander Valery Korzun, Whitson and Flight Engineer Sergei Treschev - will continue handover discussions with the Expedition Six crew - Bowersox, NASA ISS Science Officer Don Pettit and Flight Engineer Nikolai Budarin.

The transfer of items between the two spacecraft is going smoothly, as are the handover briefings for Expedition 6 Commander Ken Bowersox, Cosmonaut Nikolai Budarin and NASA ISS Science Officer Don Pettit. Expedition 5 Commander Valery Korzun, NASA Science Officer Peggy Whitson and Flight Engineer Sergei Treschev are familiarizing the new arrivals with station systems and procedure, and discussing the location of equipment and supplies on the ISS.

This afternoon, Whitson and Bowersox replaced two valves and cleared debris from vent lines of the Carbon Dioxide Removal Assembly (CDRA) in the station's U.S. Destiny laboratory. The job was completed about 8 p.m. CST. Later Mission Control radioed them that the valve replacement had been successful, but that there was a leak in one of the CDRA vacuum lines. Whitson and Bowersox began efforts to find and fix that leak late today. CDRA had not been working well for the past several weeks. A Russian system cleanses the station atmosphere of the carbon dioxide exhaled by the normal three-person crew, but CDRA is needed to handle the load of larger crews.

NBC's Jay Leno wished Endeavour Commander Jim Wetherbee a happy 50th birthday. The good wishes were videotaped during Leno's show and transmitted to Endeavour via Houston's Mission Control Center.

This afternoon Wetherbee, Endeavour Pilot Paul Lockhart, Lopez-Alegria and Herrington talked with reporters from KFOR-TV of Oklahoma City, Okla., the Chickasaw Times newspaper; and the Cadena Ser radio network of Spain. The radio network spoke with Lopez-Alegria in Spanish.

Endeavour performed the first of three scheduled reboosts of the station a little after 11 a.m., increasing the altitude of the orbiting laboratory by about 2.8 statute miles. That left the average altitude of the station and Endeavour at almost 244 statute miles. Subsequent reboosts are scheduled for Friday and Sunday.

Thursday's second of three STS-113 spacewalks will see Lopez-Alegria and Herrington make more electrical, data and fluid line connections for the new Port One (P1) truss segment, install a second wireless video antenna system and move a Crew Equipment Translation Aid railway handcar from the P1 to the S1 truss. P1 was installed just before the Tuesday spacewalk. Thursday's and Saturday's spacewalks each will last about 61/2 hours.

Thanksgiving travel is being taken to new heights by Endeavour and ISS crewmembers. They will log about 1.68 million miles during the four-day weekend, with no weather or traffic delays, no airport security problems and certainly no crowds. Their vehicles' mileage over just those four days is excellent -- almost unlimited. Lopez-Alegria and Herrington are scheduled to travel about 227,500 Thanksgiving weekend miles outside the ISS-Endeavour complex during their two spacewalks.

In the afternoon, Endeavour's crew - Commander Jim Wetherbee, Pilot Paul Lockhart and Mission Specialists Michael Lopez-Alegria and John Herrington - will take time to prepare for the second spacewalk of the mission, scheduled for Thanksgiving Day. The second spacewalk will focus on making additional connections between the new Port 1 (P1) truss segment and the station and outfitting the P1 for future use.

The Expedition Five and Six crews also will continue handover discussions and training as Expedition Six - Commander Ken Bowersox, NASA ISS Science Officer Don Pettit and Flight Engineer Nikolai Budarin - begins their stay. Expedition Five - Commander Valery Korzun, NASA ISS Science Officer Peggy Whitson and Flight Engineer Sergei Treschev -- is completing six months in orbit as they prepare to return home.

Wetherbee, Lockhart, Lopez-Alegria and Herrington will take a break from their moving duties at about 2:30 p.m. CST for interviews with KFOR-TV of Oklahoma City, OK; the Chickasaw Times newspaper; and the Cedena Ser radio network.

This morning, Mission Control radioed up birthday greetings to Wetherbee, who is celebrating his 50th birthday in orbit today.

The crew of Endeavour was awakened at 7:20 a.m. and the Expedition Six crew was awakened at 7:50 a.m. The shuttle and station remain in excellent condition.

Endeavour Mission Specialists Mike Lopez-Alegria and John Herrington will exit the station's Quest airlock for a second time during this mission to begin a 61/2-hour spacewalk. Scheduled to begin about 1:20 p.m. central time, the work outside the station today will see Lopez-Alegria and Herrington connect fluid lines from the new Port One (P1) truss segment to the Starboard Zero (S0) truss; install a second wireless video antenna system to the P1; relocate stanchions that were used to hold the P1 in place during launch; and move a Crew Equipment Translation Aid railway handcar from the P1 to the Starboard One (S1) truss.

Endeavour Pilot Paul Lockhart will coordinate the spacewalk from the orbiter's flight deck and Endeavour Commander Jim Wetherbee will provide photo and TV support. From the ISS, Expedition Five NASA Science Officer Peggy Whitson will provide robotic arm support using the station's Canadarm2, and will be assisted by Expedition Six NASA ISS Science Officer Don Pettit.

Expedition Five Commander Valery Korzun, Whitson and Flight Engineer Sergei Treschev will also continue their handover and training briefings for Expedition Six Commander Ken Bowersox, Flight Engineer Nikolai Budarin and Pettit.

Whitson and Bowersox will take some time today to test the station's bicycle ergometer, which experienced some trouble over the weekend. In addition to being used for exercise, it is used as part of a pre-spacewalk protocol to purge nitrogen from crewmembers' bodies. Testing of the Carbon Dioxide Removal Assembly in the station's Destiny laboratory continued overnight and showed that maintenance work performed by the crew on Wednesday had resolved a faulty valve problem with the system.

The Thanksgiving Day spacewalk started at 12:36 p.m. CST, almost 45 minutes ahead of schedule, and ended officially at 6:46 p.m.

Lopez-Alegria and Herrington were helped by intravehicular officer Paul Lockhart, Endeavour's pilot, who coached them through their activities from the shuttle's aft flight deck. Expedition 5 NASA ISS Science Officer Peggy Whitson, with help from her Expedition 6 successor Don Pettit, operated the station's Canadarm 2. Endeavour Commander Jim Wetherbee did photo and TV documentation.

The first task for Lopez-Alegria, wearing the spacesuit with red stripes, and Herrington, in the all-white spacesuit, was connection of two fluid jumpers between P1 and the Starboard Zero (S0) truss centerpiece. The jumpers link plumbing for ammonia in the station's cooling system. Next the spacewalkers removed the starboard keel pin, a launch support, and using the Crew and Equipment Translation Aid - one of two handcar-like devices on the truss railway - moved it to the proper location and stowed it in the P1 truss structure.

Lopez-Alegria and Herrington installed a second Wireless video system External Transceiver Assembly (WETA), this one on the P1 truss. They had installed the first WETA on the station's Unity Node during their Tuesday spacewalk. After removal and stowage of the port keel pin, they did the first of the additional jobs, releasing launch locks on the P1's radiator beams. Then they turned their attention to relocation of the CETA cart.

Herrington, in a foot restraint on Canadarm2, lifted the cart from its tracks and held it while Whitson swung him and his cargo around the front of the station, past Endeavour's cargo bay and to the Starboard One (S1), where he attached the cart to tracks and secured it to its sister CETA, launched with the S1 truss on Atlantis' STS-112 flight in October. The relocation was done to clear the P1 tracks for the Canadarm2 to move along them on its Mobile Transporter and Mobile Base System.

The CETA move accomplished, the two spacewalkers moved on to the second additional task, reconnection of one of the cables on the WETA installed Tuesday. Both extra jobs took about 20 minutes.

The oxygen prebreathe protocol before today's spacewak to purge nitrogen from spacewalkers' bloodstreams, was done on the shuttle's cycle ergometer. Whitson and Expedition 6 Commander Ken Bowersox checked out the station's cycle ergometer with a newly uplinked procedure to use it in manual mode.

Expedition 5 Commander Valery Korzun, Whitson and Flight Engineer Sergei Treschev continued their handover briefings for Bowersox, cosmonaut Nikolai Budarin and Pettit. Transfer of equipment and supplies between the station and shuttle also continued.

The Carbon Dioxide Removal Assembly (CDRA) is functioning well. Whitson and Bowersox replaced two valves and cleaned airlines on the device on Wednesday, and later that evening they repaired a leak in a CDRA vacuum line.

Handover briefings of the Expedition 6 crew, Commander Ken Bowersox, cosmonaut Nikolai Budarin and NASA ISS Science Officer Don Pettit, by their Expedition 5 predecessors, Commander Valery Korzun, NASA ISS Science Officer Peggy Whitson and cosmonaut Sergei Treschev, continued. The briefings focus on procedures aboard the ISS, science and the location of equipment and supplies.

This afternoon Korzun ceremonially handed over the reigns of the station to Bowersox. Expedition 6 has been the official station crew since Monday when they installed their custom seat liners in the Soyuz spacecraft attached to the station. Later in the afternoon the 10 astronauts and cosmonauts held their crew news conference, fielding questions from reporters at Johnson Space Center and Kennedy Space Center.

Endeavour commander Jim Wetherbee initiated a series of shuttle thruster firings which boosted the altitude of the International Space Station by about eight-tenths of a mile this morning. The reboost left the station at an average altitude of more than 244 statute miles. It was the second of three reboosts during Endeavour's mission to the station. The first, on Wednesday, increased the station's altitude by about 2.8 miles. A third reboost is scheduled for Sunday.

Whitson and Pettit did troubleshooting on the Microgravity Science Glovebox (MSG) on board the station. They checked electrical circuits upstream and downstream of the MSG's power distribution and conversion box - the device that provides electrical power to the facility - in hopes of identifying what caused the component to fail Nov. 20.

Endeavour astronauts Michael Lopez-Alegria and John Herrington reviewed procedures for their third and final spacewalk of the STS-113 mission on Saturday. Participating were pilot and spacewalk intravehicular officer Paul Lockhart, Bowersox and Canadarm2 operators Whitson and Pettit. Much of the spacewalk will be devoted to installation of 33 spool positioning devices, to ensure that quick disconnect devices in station ammonia coolant lines will release as designed. Other tasks include connecting Ammonia Tank Assembly umbilicals and reconfiguring a circuit breaker on the Main Bus Switching Unit. If time allows, they also will reconfigure the Squib Firing Unit, designed to release Port One truss radiator panels for deployment.

Among the items to be transferred today are various science experiments, two returning home aboard Endeavour and one moving to the station. This morning, Mission Specialist Mike Lopez-Alegria and Expedition Five NASA ISS Science Officer Peggy Whitson will transfer the Protein Crystal Growth Single Thermal Enclosure System (PCG-STES) - Unit 7 to Endeavour, while Expedition Six Commander Ken Bowersox will transfer PCG-STES Unit 10 from the shuttle to the station. This afternoon, Lopez-Alegria and Expedition Six NASA ISS Science Officer Don Pettit will transfer the Plant Generic Bioprocessing Apparatus (PGBA) to Endeavour. Plants grown while on orbit will be studied by researchers on the ground.

Whitson and Pettit will also spend some time today troubleshooting the Microgravity Science Glovebox (MSG) on board the station. The MSG recently developed a problem with its power distribution and conversion box - the device that provides electrical power to the facility.

To date, NASA has conducted more than 90,000 hours of scientific research aboard the station and the Expedition Six crew is scheduled to conduct 18 new or continuing experiments.

About 11 a.m., Commander Jim Wetherbee will fire Endeavour's small thruster jets to gently raise the altitude of the station by slightly less than one mile. Late today, Pilot Paul Lockhart, Mission Specialist John Herrington, Lopez-Alegria, Whitson, Bowersox and Pettit will take time to review plans for Saturday's third and final scheduled spacewalk of the mission.

A formal Change of Command ceremony between the Expedition Five and Six crews is scheduled for 2:20 p.m., but may occur earlier. The full crews also will gather for a joint crew news conference beginning at 3:49 p.m. central time.

Today's spacewalk began at 1:25 p.m., with Herrington being asked to look for possible obstructions that might have stalled the station's railcar, or Mobile Transporter (MT) that had stopped unexpectedly about 10 feet short of its intended destination. At 10:21 a.m. today, the MT was commanded to move from its position at Worksite 4 near the S-Zero (S0) truss to Worksite 7 where the station's robotic arm would have "walked off" from its mooring on the Destiny Laboratory to the MT and been used to maneuver Herrington through some of his tasks.

Herrington spotted a stowed UHF communications antenna that had snagged a trailing umbilical mechanism on the MT, halting its motion. Herrington then deployed the antenna, freeing the MT to continue its travel toward Worksite 7. At 4:11 p.m., the railcar was in place and just before 6 p.m., was securely latched into place.

Flight controllers evaluated the performance of the railcar and possible impacts to the spacewalk schedule as a result of troubleshooting activities, ultimately deciding to reprioritize some of today's tasks to ensure the high priority items were completed. After Herrington informed flight controllers he could complete all his assigned tasks without using the station's robotic arm, flight controllers elected not to perform the "walk off" of the station arm to the MT.

Herrington and Lopez-Alegria successfully completed all of their assigned tasks during today's spacewalk, including the installation of 33 spool positioning devices on various locations around the outside of the station. From onboard Endeavour, Pilot Paul Lockhart coordinated the two spacewalkers' efforts, providing them with visual cues as they moved around the station.

Aboard the station, handover activities continued between Expedition Five Commander Valery Korzun and Flight Engineer Sergei Treschev and Expedition Six Commander Ken Bowersox and Flight Engineer Nikolai Budarin.

Pilot Paul Lockhart will coordinate the spacewalk from the aft flight deck of Endeavour. The station's robotic arm, the Canadarm2, will be operated at varying times by Expedition Five Flight Engineer Peggy Whitson, Expedition Six Commander Ken Bowersox and Expedition Six NASA ISS Science Officer Don Pettit. Commander Jim Wetherbee will provide TV and photo support.

The spacewalkers will begin by installing 33 spool positioning devices on various locations around the outside of the station. The clamp-like devices ensure that the quick disconnect fittings in the station's ammonia coolant lines release as designed.

Other spacewalk tasks include connecting the Ammonia Tank Assembly umbilicals and reconfiguring a circuit breaker on the Main Bus Switching Unit. If time allows, the two also will reconfigure the Squib Firing Unit, a pyrotechnic device designed to release the Port One truss radiator panels when they are deployed next year.

Before the spacewalk begins, Whitson and Bowersox will command the Canadarm2 to walk off its current location on the Destiny Laboratory to its mobile base on the P1 truss. Whitson will operate the robotic arm with Pettit assisting during some of the spacewalk activities. When Herrington is finished, Whitson and Bowersox will command the Canadarm2 to return to a Power and Data Grapple Fixture on the Destiny Laboratory.

During the spacewalk, Expedition Five Commander Valery Korzun and Flight Engineer Sergei Treschev will continue handover activities with Bowersox and Expedition Six Flight Engineer Nikolai Budarin. Korzun and Treschev also will complete their final sessions in the Lower Body Negative Pressure suit, a Russian device to help the cosmonauts prepare for their return to Earth's gravity.

This morning Endeavour Commander Jim Wetherbee initiated a series of firings of Endeavour's thrusters to raise the station's altitude by about 2.8 statute miles. This was the third reboost of the flight and left the ISS almost 61/2 miles higher than it was when the shuttle docked on Nov. 25. The station's average altitude is now about 247 miles.

Shuttle crewmembers, Wetherbee, Pilot Paul Lockhart, Mission Specialists Michael Lopez-Alegria and John Herrington, and Expedition 5's NASA ISS Science Officer Peggy Whitson, her Expedition 6 successor Don Pettit and Expedition 6 Commander Ken Bowersox, spoke with representatives of Indian Country Today and Native America Calling radio network.

Transfer activities wound down, with the crew wrapping up movement of supplies, equipment and experiments between the two spacecraft. Endeavour brought more than 2,500 pounds of material to the station in the shuttle's crew compartment.

During the afternoon, Pettit and Whitson did additional troubleshooting on the Microgravity Science Glovebox (MSG) in the station's U.S. laboratory Destiny. The glovebox allows experiments with fluids, flame, particles or fumes to be performed in an enclosed environment. The MSG's power distribution and conversion box failed Nov. 20. The box will be returned to Earth aboard Endeavour, leaving the MSG inactive.

Handover talks continued between the Expedition 5 crew, Commander Valery Korzun, Whitson and cosmonaut Sergei Treschev, and Expedition 6 crewmembers Bowersox, Cosmonaut Nikolai Budarin and Pettit.

Hatches between the two spacecraft are to be closed about 11:15 a.m. CST Monday, with Endeavour undocking from the station about 2:05 p.m. near the west coast of Australia after a pass over the Indian Ocean. Landing is scheduled for Wednesday afternoon at Kennedy Space Center.

Since Endeavour arrived at the station on November 25, the 10 astronauts and cosmonauts have successfully worked together to install the 14-ton P1 truss segment, outfit and activate it during three spacewalks, transfer equipment, experiments and supplies between the two spacecraft, and exchange resident crews aboard the station.

Today, spacewalkers Mike Lopez-Alegria and John Herrington, along with Pilot Paul Lockhart will clean up and stow away their spacesuits, following the conclusion of Saturday's final spacewalk of the mission. Endeavour Commander Jim Wetherbee will gently pulse the orbiter's thrusters this morning to raise the station's altitude by approximately 2.8 miles. The jet firings will last approximately 45 minutes, and combined with two previous reboost maneuvers earlier in the mission, should increase the station's total altitude by about 6 1/4 miles.

The crew will also take some time today to verify operation of the tools that will be used during Monday's undocking of Endeavour from the International Space Station and to complete the final transfer of equipment. Approximately 95 percent of transfer activities are complete.

About 2 p.m. central time, Wetherbee, Lockhart, Lopez-Alegria and Herrington, Expedition Six Commander Ken Bowersox and NASA ISS Science Officer Don Pettit, will talk with media representatives from CNN Espanol, Indian Country Today and the Native America Calling radio network.

Final handover briefings between the Expedition Five and Expedition Six crews will continue throughout the day, as the 10 astronauts and cosmonauts prepare to bid each other farewell tomorrow. Hatches between the two spacecraft are slated to be closed about 11:15 a.m. central time Monday, with Endeavour undocking from the station about 2:05 p.m.

Endeavour will leave behind the Expedition Six Crew - Commander Ken Bowersox, NASA ISS Science Officer Don Pettit and Flight Engineer Nikolai Budarin - who are scheduled to live and work aboard the station for the next four months.

Endeavour Commander Jim Wetherbee, Pilot Paul Lockhart, Mission Specialists Michael Lopez-Alegria and John Herrington, and Expedition Five Commander Valery Korzun, NASA ISS Science Officer Peggy Whitson and Flight Engineer Sergei Treschev are scheduled to begin those farewells at 11:15 a.m.

Endeavour is scheduled to undock from the space station at 2:05 p.m., after bringing the station a new resident crew, installing the Port One truss and transferring more than 2,500 pounds of supplies, equipment and experiments. As Endeavour gently undocks and backs slowly away from the station, the two vehicles should be flying high over Western Australia.

Shortly after undocking, the Endeavour crew will release two miniature satellites as part of an experiment referred to as MEPSI. Funded by the Defense Advanced Research Projects Agency (DARPA), the two small satellites, which are tethered together, will be released from Endeavour's payload bay to fly free for three days as a technology demonstration of the launcher assembly and use of micro-and nano-technolgoies in space systems.

As the Expedition Six crew settles into its first day alone aboard the station, Endeavour's crew will begin stowing away equipment and hardware in anticipation of Wednesday's scheduled landing at the Kennedy Space Center. Weather permitting, Endeavour is scheduled to return to Earth on Wednesday at 2:48 p.m. central.

After final farewells among the STS-113 and Expedition 5 and 6 crews, the hatches between the spacecraf