STS-51D Mission Patch

16th Space Shuttle Mission

4th Flight of Discovery Crew:

Karol J. Bobko, Commander

Donald E. Williams, Pilot

M. Rhea Seddon, Mission Specialist

S. David Griggs, Mission Specialist

Jeffrey A. Hoffman, Mission Specialist

Charles D. Walker, Payload Specialist

U.S. Senator E.J. Garn, Payload Specialist

U.S. Senator E.J. Garn (R-Utah) became the first civilian observer to fly aboard a Space Shuttle. Garn acted as a Payload Specialist and Congressional Observer and participated in a host of medical experiments during the flight.