STS-51-I was the twentieth mission of NASA's Space Shuttle program and the sixth flight of Space Shuttle Discovery. During the mission, Discovery deployed three communications satellites into orbit. The mission launched from Kennedy Space Center, Florida, on 27 August 1985, and landed seven days later at Edwards Air Force Base, California.

Read more about STS-51-I:  Crew, Mission Parameters, Mission Summary, Gallery, Wake-up Calls