2018-01-102018-01-101985http://hdl.handle.net/2152.3/4375STS-51-D was the sixteenth flight of NASA's Space Shuttle program, and the fourth flight of Space Shuttle Discovery (12 April, 1985- 19 April).This image reflects STS-51-D Jeffrey A. Hoffman on the treadmill.Space MedicineshuttleSTS-51-DJeffrey A. Hoffman\Treadmill