Checking your work — CCA-F Exam Prep

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REAL STORY The Challenger space shuttle on the launch pad at dawn. Icicles visible on the launch structure. Temperature readout shows 36F. In the foreground, an engineer holds a paper showing O-ring failure data. His face shows dread. Cold morning, January 1986.

The Challenger space shuttle on the launch pad at dawn. Icicles visible on the launch structure. Temperature readout shows 36F. In the foreground, an engineer holds a paper showing O-ring failure data. His face shows dread. Cold morning, January 1986.

T-minus 73 seconds.

January 28, 1986. An engineer named Roger Boisjoly saw the O-ring data. It showed failure risk below 53 degrees Fahrenheit. Launch temperature: 36 degrees. He raised the concern. He presented the data. He recommended delaying launch.