William Arthur Pailes (Colonel, USAF) (born June 26, 1952) was a USAF astronaut in the Manned Spaceflight Engineer Program during the mid-1980s. He served as a Payload Specialist on STS-51-J Atlantis (October 3–7, 1985).
STS-51-J was the twenty-first space shuttle mission and the maiden flight of the Space Shuttle Atlantis. It was the second mission dedicated to deploying a Department of Defence payload. It was a classified mission however we do know that it deployed two 10 satellites.Low Earth Orbit
The United States Air Force (USAF) is the air service branch of the United States Armed Forces, and is one of the eight uniformed services of the United States. Originally created on 1 August 1907, as a part of the United States Army Signal Corps, the USAF was established as a separate branch of the United States Armed Forces in 1947 with the enactment of the National Security Act of 1947.