NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
Teacher Christa McAuliffe, one of the crew members on the shuttle Challenger mission 51-L, which exploded seventy three seconds after lift off on the 28th January 1986. All seven crew members were killed. It is thought that the accident was caused by a failure of an 0-ring in a seal on the right hand solid rocket booster. The subsequent leak of fuel resulted in the explosion.
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