Remembering the seven crew mates of the Space Shuttle Challenger, who perished when the orbiter broke apart 73 seconds into its flight on January 28, 1986. In the group photo, left to right, front row: astronauts Michael J. Smith, Francis R. (Dick) Scobee and Ronald E. McNair. In the back row: Ellison S. Onizuka, Christa McAuliffe, Gregory Jarvis and Judith A. Resnik. McAuliffe and Jarvis were civilian payload specialists, representing the Teacher in Space Project and Hughes Company, respectively. (NASA)