The chilly morning of Jan. 28, 1986, ended in disaster as the space shuttle Challenger broke apart off the coast of Florida in one of the worst tragedies in the history of NASA.

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In this Jan. 28, 1986 file photo, the space shuttle Challenger explodes shortly after lifting off from the Kennedy Space Center in Cape Canaveral, Fla. (AP Photo/Bruce Weaver, File)

The mission, known as STS-51-L, was the 10th flight

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