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STS-80 was a Space Shuttle mission flown by Space Shuttle ''Columbia''. The launch was originally scheduled for October 31, 1996, but was delayed to November 19 for several reasons. Likewise, the landing, which was originally scheduled for December 5, was pushed back to December 7 after bad weather prevented landing for two days.

It was the longest Shuttle mission ever flown at 17 days, 15 hours, and 53 minutes.

Although two spacewalks

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