NASA, Challenger and Space Shuttle Columbia
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New Hampshire school teacher Christa McAuliffe died on January 28, 1986 when the space shuttle Challenger exploded.
Wednesday marked 40 years since the space shuttle Challenger accident that killed seven crew members. The mission was not just to launch satellites but to launch the first teacher in space.
Families of the astronauts lost in the space shuttle Challenger accident are marking that tragic day 40 years ago