Space Shuttle Challenger, STS-51L, Crew (l-r): Mission Specialist Ellison S. Onizuka, Pilot Michael J. Smith, Payload Specialist Christa McAuliffe, Commander Francis R. “Dick” Scobee, Payload Specialist Gregory B. Jarvis, Mission Specialist Judith A. Resnik, Mission Specialist Ronald E. McNair. (Photo courtesy of NASA)