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Why did the Challenger explode?

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During flight the O-rings continued to not seal the joint, and the gases leaked through the aft field joint. The flame grew larger and later blew Challenger up. January 28, 1986 was the day when seven US astronauts died when their shuttle exploded 73 seconds after launch. read more

After "Teacher in Space" Christa McAuliffe was killed during the 1986 Challenger disaster, her backup, a former math teacher named Barbara Morgan, served as a mission specialist during a 2007 flight of the shuttle Endeavor. read more

Few people actually saw the Challenger tragedy unfold live on television. The shuttle did not explode in the common definition of that word. The flight, and the astronauts’ lives, did not end at that point, 73 seconds after launch. read more

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Recalling the Space Shuttle Challenger's Explosion - US News
Source: usnews.com

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