Space Shuttle Challenger Explosion
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Former astronaut and professor Terry Hart is opening up 40 years later about the friends and colleagues he lost on board the space shuttle Challenger explosion.
Wednesday marks a somber anniversary in American history. 40 years ago, seven astronauts were killed when Space Shuttle Challenger exploded during liftoff.
40 years ago today, millions watched in horror as NASA’s Space Shuttle Challenger exploded in mid-air. All seven crew members on board were killed—including a teacher who was about to become the first educator in space.