Space Shuttle Challenger Explosion
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NASA's space shuttle Challenger completed 10 missions before it broke apart during a launch in 1986, killing seven astronauts.
Dave Reynolds was in second grade at Lakeview Elementary in Roy, Utah, on January 28, 1986, when his teacher wheeled in a TV to watch what was supposed to be a historic moment in space exploration.
On Jan. 28, 1986, America witnessed a tragedy: the explosion of Space Shuttle Challenger in the blue skies over Florida. The doomed shuttle touched us like we have never been touched before because along with the tragic loss of astronauts, a teacher was on board.