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Mark's Almanac for January 28, 2021

Space shuttle Challenger being carried to the launch pad.
Space shuttle Challenger being carried to the launch pad.

It was on this day in 1986 that the space shuttle Challenger exploded after lift-off. Following the tragedy, President Reagan launched a commission to investigate what went wrong. It was discovered that a faulty O-ring in conjunction with the cold temperatures at launch time lead to the disaster.

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