STS-51C - A-B Emblem

STS-51-C was the 15th flight of NASA's Space Shuttle program, and the third flight of Space Shuttle Discovery. It launched on 24 January 1985, and made the fourth shuttle landing at Kennedy Space Center, Florida, on 27 January. STS-51-C was the first shuttle mission to deploy a dedicated United States Department of Defense (DoD) payload, and consequently many mission details remain classified.