The 15th space shuttle mission (51-C) is the first all-military flight. The Discovery crew of Navy Capt. Thomas K. Mattingly (mission commander), Air Force Lt. Col. Loren J. Shriver (pilot), and Air Force mission specialists Lt. Col. Ellison S. Onizuka and Maj. Gary E. Payton, along with Marine Lt. Col. James F. Buchli, deploy a classified payload, believed to be a signals intelligence satellite.
In a nighttime ceremony contrived to continue concealment of many of its features, the new B-21 bomber rolled out of Northrop Grumman's Palmdale, Calif. plant Dec. 2. Defense Secretary Lloyd Austin said the aircraft's advanced technology represents "deterrence, the American way."