The Air Force briefed the Armed Forces Policy Council on a reconnaissance satellite program and possible combinations of vehicles that could be used for "cold war and scientific programs. The Air Force recommended using the available intermediate range ballistic missile as a booster to hasten launching an orbital system as early as March 1958. If approved this program would require an additional six Thors and $12 million to cover additional costs. (Ltr, Co0 R. J. Nunzia.o, Asst for Spec Prog, DCS/Dev, Hq USAF, to SAFRD, 12 Nov 57, subj: Outer Space Vehicle.)

President Eisenhower directed the highest and equal national priority for Atlas, Titan, Thor, Jupiter, the WS 117L advanced military satellite system, and WS 224A BMEWS. This action returned the Titan program to its previous highest national priority status.

The Office of the Secretary of Defense, in the first significant forward step to accelerate development of a space capability, reiterated the space role of the Air Force. In addition to its missile programs the Air Force was responsible for the 117L system and "... has a recognized long term development responsibility for manned space flight capability with the primary objective of accomplishing satellite flight as soon as technology permits." Furthermore, the Air Force was told it was to carry forward and accelerate the Atlas 117L project "under the highest national priority in order to attain an initial operational capability in the earliest possible date," But the proposed interim system using a Thor booster combined with a second stage and recoverable capsule "should not be pursued. " The Department of Defense did agree that a Thor booster with a suitable second stage "may be the most promptly and readily available device for experimental flights with laboratory animals" and development of such hardware including a system for recovery of animals was authorized. (Msg 03-014, Cmdr ARDC, to Cmdr AFBMD, 5 Mar 58.)

In the first use of a Thor as a space booster, the world's first polar orbiting satellite, Discoverer I, was launched by a Thor/Agena (Thor 163) booster combination from Vandenberg AFB. The mission was also the first successful flight test of Lockheed's Agena A upper stage vehicle designed for orbiting U.S. satellite systems. First polar orbiting satellite; KH-1 prototype; did not carry camera or film capsule.

An Air Force Thor/Agena A booster vehicle lifted Discoverer II into orbit from Vandenberg AFB. Discoverer II became the world's first satellite to be stabilized in orbit in all three axes, to be maneuvered on command from earth, to separate a reentry vehicle on command, and to send its reentry vehicle back to earth. The capsule ejector system malfunctioned, causing the capsule to impact near Spitsbergen on 14 April rather than near Hawaii as planned. KH-1 prototype; tested capsule recovery techniques; did not carry camera; capsule recovery failed. Because of a timing error, the US believed that the capsule landed somewhere on the island of Spitsbergen, north of Norway, instead of landing in the recovery zone near Hawaii. The capsule was never found; and CIA officials suspect it may have been snatched by the Soviets. The search for this capsule formed the basis of the book and film 'Ice Station Zebra'.

In the winter of 1960/1961, a US Discovery spy satellite capsule was found by loggers near Kalinin, 200 km north of Moscow. The loggers cracked it open with an axe. Sergei Khrushchev believed this to be the Discoverer 2 capsule. What was left was examined by Soviet engineers but didn't reveal much information - it was a polished aluminium sphere, 30 cm in diameter, gilded on the exterior. Some said it was found as early as the winter of 1959.

Once again, the Defense Department reorganized its space program. Primary responsibility for military space programs was assigned to the Air Force. ARPA retained responsibility for advanced research on missile defense, solid propellants, and several other projects. Existing projects were reassigned to the military services from ARPA - MIDAS and SAMOS to the Air Force,the Transit navigation satellite to the Navy, and NOTUS to the Army. These reassignments were not immediately effective, but the move toward Air Force development, production, and launching of military space vehicles was quite clear.

Based on the 23 September decision, all Defense Department satellite and space vehicle programs were to be reassigned to the military services of primary interest. The Discoverer, MIDAS, and SAMOS programs were approved for transfer back to AFBMD from ARPA. All three programs were originally part of the WS 117L program that AFBMD had managed from inception in 1956 until the Advanced Research Projects Agency (ARPA) had assumed responsibility on 30 June 1958.

The Air Force MIDAS I satellite was launched from Cape Canaveral in the first successful launch of the Atlas D/Agena A booster-upper stage combination. MIDAS I, however, failed to achieve orbit because an accident at the Atlas-Agena staging damaged the Agena. The entire vehicle reentered and burned up about 2,500 miles downrange. Missile Defense Alarm System.

Missile Defense Alarm System. Test launch with W-17 sensor. The last Atlas D/Agena A booster to be used by the Air Force placed into orbit the MIDAS II infrared scanning satellite designed to detect and give early warning of missile launchings. Although intended to function for 40 months, the satellite's telemetry system failed on 26 May. MIDAS II was the first early warning satellite system placed in orbit.

A Thor/Agena A launched from Vandenberg AFB placed Discoverer XIII in orbit. On 11 August, the data capsule was ejected during the 17th pass and recovered Pacific Ocean near Hawaii by a Navy helicopter that was part of the 6593d Test Squadron's task force. Although the planned mid-air recovery was not made, the return of Discoverer XIII1s data capsule marked the first successful recovery of a man-made object ejected from an orbiting satellite. KH-1 prototype; designed to test capsule recovery system; did not carry camera; capsule successfully recovered from ocean.

The second Thor/Agena B to be launched from Vandenberg AFB was the first successful flight of the more advanced Lockheed Agena B upper stage. KH-1; film capsule recovered 2.1 days later. Mission failed. Obtained orbit successfully. Film separated before any camera operation leaving only 1.7 ft of film in capsule. On December 2, the Air Force revealed that exceedingly valuable information had been obtained from human tissues carried by Discoverer 17 (the cover story for the mission). The tissues had been exposed to an unexpectedly heavy dose of radiation for more than 50 hours in flight.

An Air Force Atlas D/Agena A was launched from Vandenberg and successfully placed the SAMOS II satellite into orbit. This was the last Air Force use of an Agena A upper stage vehicle. First generation photo surveillance; radio relay of images; micrometeoroid impact data. Poor results.

MIDAS III (Missile Defense Alarm System) satellite was launched into polar orbit from Vandenberg AFB by the first Atlas D/Agena B booster (97D/#1201). This vehicle achieved a record 1,850-mile orbit and was the heaviest U.S. satellite put up to date. Missile Defense Alarm System.

First generation photo surveillance; return of camera and film by capsule; SAMOS type satellite. Reached orbit but failed to deorbit and be recovered. In his memoirs Sergei Khrushchev recounts recovery of what he believed to be a recoverable Samos, except the date given is the winter before tests of this configuration actually started. He relates that a second American capsule was recovered in the spring of 1961. It was equipped with a 30 cm lens and 100's of metres of 10 cm wide film. Also recovered were a pear-shaped module made of fibreglass, and an inertial orientation system powered by electric motors. It may have been a SAMOS prototype. The capsule was found by tractor drivers, who disassembled it and used the film to wrap around the frame of their outhouse to provide some privacy in the treeless area. Unfortunately this ruined the film, preventing the Russians from developing it and discovering the technical capabilities of the system.

The first Agena D (#1151) upper stage vehicle was successfully flown on a Thor booster (#340) launched from Vandenberg AFB. The Lockheed Agena D was a redesign of the basic Agena B and was intended to be the standard stage vehicle for most Defense Department and NASA programs. The program was begun in August 1961, revised and accelerated in November, and had its first flight in June 1962. KH-4; film capsule recovered 4.1 days later. Severe corona static.

The Air Force launched its first Atlas D/Agena D from Vandenberg. This was the 100th Agena (Number 4702) space vehicle used since 28 February 1959. KH-7 type satellite. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).

Atlas 109F was the final Atlas research and development flight test missile to be launched. Since the first attempted launch of a Series A Atlas on 11 June 1957, 95 Atlas missiles had been used in the R&D program - eight As, nine Bs, six Cs, 32 Ds, 24 Es, and 16 Fs. All but 12 of these were launched from Cape Canaveral. Of the 95 launches, 57 were considered successful while 38 were failures. KH-7 type satellite. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).

The first Atlas/Agena D standard launch vehicle (SLV-3, 7100 Series) was successfully launched from Vandenberg AFB. This vehicle, Number 7101, was the first Atlas booster to be designed and produced to fully standardized specifications. KH-7 type satellite. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).

The 100th Thor/Agena, a Thrust Augmented Thor/Agena D (421/1170) was launched from Vandenberg AFB by the 6595th ATWg. KH-4A. Primary mode of recovery failed on second portion of the mission (1011-2). Small out of focus areas present at random on both cameras.

First test of a side-looking radar from outer space. The mission lasted only four days, as planned, before the batteries ran out of power during orbits 72-73. The radar operated 14 times in orbit, between 22 and 26 December, imaging swaths of the northeastern and western United States. Data collected from the 14 radar passes were transmitted over a wideband (UHF) data link as they were obtained ("real time") to the Vandenberg or New Boston ground station in view. In addition, during the first seven radar passes data were recorded on film on board the satellite, and on 23 December, during the 33rd orbit, the reentry capsule was jettisoned and recovered. The vehicle and payload performance were within acceptable limits on all parameters. The radar maps covered about 80,000 square miles and the resolution was better than 15 feet in azimuth and 80 feet in ground range. The mission, not declassified until 2012, proved the feasibility of space-based surveillance, leading to the operational Lacrosse satellites of the 1980's.

After the initial launch attempt oil the 28th was held at T minus 12 seconds, the first Titan IIIB/Agena D was successfully launched from Vandenberg AFB. All primary and secondary test objectives were met during the launch and flight which completed the research and development program for the Titan IIIB. This newest member of the Titan III (SLV-5) KH-8 type satellite. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).