[Answer] Which component failed during the Challenger’s January 1986 launch, causing it to explode?

Step 1 : Introduction to the question "Which component failed during the Challenger’s January 1986 launch, causing it to explode?"

...The explosion of the Space Shuttle Challenger on January 28, 1986, just 73 seconds after liftoff, was caused by the failure of an O-ring seal in the right solid rocket booster. The O-rings were designed to prevent hot gases from escaping, but unusually cold temperatures on launch day caused them to become brittle and lose their flexibility. As a result, hot gases leaked and ignited the adjacent external fuel tank, leading to the shuttle’s catastrophic disintegration. All seven crew members on board, including teacher Christa McAuliffe, were killed in the disaster.

Step 2 : Answer to the question "Which component failed during the Challenger’s January 1986 launch, causing it to explode?"

O-ring seal:

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