Photos: Challenger explosion, Jan. 28, 1986
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ASTRONAUT CREW: This 1986 file photo provided by NASA shows the crew of the space shuttle Challenger, from left, Ellison Onizuka, Mike Smith, Christa McAuliffe, Dick Scobee, Greg Jarvis, Ron McNair and Judith Resnik. The shuttle exploded 30 years ago on Jan. 28, 1986. (AP Photo/NASA)