Challenger disaster wreckage. Fragment from the space shuttle Challenger being lowered into an abandoned missile silo at Cape Canaveral air force station. Challenger exploded 73 seconds after lift-off from Kennedy Space Centre, Florida, USA 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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