Space Shuttle Challenger Explosion
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Seven American spacefarers were killed in a tragic event 40 years ago today that has become widely known as the Challenger disaster.
NASA's space shuttle Challenger completed 10 missions before it broke apart during a launch in 1986, killing seven astronauts.
Wednesday marks a somber anniversary in American history. 40 years ago, seven astronauts were killed when Space Shuttle Challenger exploded during liftoff.