Personal: Male. Born in USA. Suicide

Donald D. Williams was instrumental in the development of the Early Bird and Syncom communications satellites. He was employed by the Hughes Aircraft Company and was named one of America's ten outstanding young men of 1965 by the United States Junior Chamber of Commerce. On 21 February 1966, Williams committed suicide.

• Launius, Roger D, NASA Chief Historian, NASA History Office Home Page, . Accessed at: http://www.hq.nasa.gov/office/pao/History/index.html.