NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
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Mission STS-51L Challenger crew standing in the White Room at launch Pad 39B, Kennedy Space Center, Florida, USA. From left to right are; Christa McAuliffe (Teacher in Space participant), Gregory Jarvis (payload specialist), Judy Resnik (mission specialist), Dick Scobee (commander), Ronald McNair (mission specialist), Michael Smith (pilot) and Ellison Onizuka (mission specialist). Challenger exploded 73 seconds after lift-off from Kennedy Space Centre on 28 January 1986. The explosion occurred as a result of a failure of one of the O-rings in a seal on one of the booster rockets. A subsequent leakage of fuel triggered the explosion that killed all seven crew members.
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