This special photo of the fated Challenger STS 51-L crew is signed by all seven crew members: In the back row from left to right: Mission Specialist, Ellison S. Onizuka; Teacher in Space Participant Sharon Christa McAuliffe; Payload Specialist, Greg Jarvis; and Mission Specialist, Judy Resnik. In the front row from left to right: Pilot Mike Smith; Commander, Dick Scobee; and Mission Specialist, Ron McNair.