STS-51C Mission Patch
Item #: MP51C
15th Space Shuttle Mission 3rd Flight of Discovery Crew: Thomas K. Mattingly II, Commander Loren J. Shriver, Pilot James F. Buchli, Mission Specialist Ellison S. Onizuka, Mission Specialist Gary E. Payton, Payload Specialist This was the first dedicated Department of Defense mission. Elements of the mission were kept secret. However, it was reported that a U.S. Air Force Inertial Upper Stage (IUS) booster successfully deployed a secret payload.