STS-51-L was the disastrous 25th mission of NASA's Space Shuttle program and the final flight of Space Shuttle Challenger.
Challenger launches at the start of STS-51-L. 73 seconds later, the shuttle's external tank would combust, causing the breakup of the shuttle and the deaths of all 7 crew on board.
Back row: Ellison S. Onizuka, S. Christa McAuliffe, Gregory B. Jarvis, Judith A. Resnik Front row: Michael J. Smith, Francis R. "Dick" Scobee, Ronald E. McNairSpace Shuttle program← STS-61-C (24)STS-26 → STS-61-E →