Challenger, NASA
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NASA's space shuttle Challenger completed 10 missions before it broke apart during a launch in 1986, killing seven astronauts ...
Steve Hawley, who flew five Space Shuttle missions, and Krista Schaffer, a first-grade teacher at Christa McAuliffe ...
Wednesday marked the 40-year anniversary of the Challenger space shuttle tragedy, which claimed the lives of seven people and ...
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