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The extreme cold the night before lift off caused the rubber on the O-rings to shrink. The O-ring became to small to close the joint properly. Hot gases escaped and damaged 1 SRB and the fuel tank. As the shuttle shot higher into the sky, the broken parts twisted loose. Dangerous gases began pouring out with great force. The rocket could not stand the extra force. The fuel tank broke apart, along with the Challenger,

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15y ago
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Q: Cause of challenger disaster
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