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The X-15, a rocket-powered aircraft developed by NASA and the U.S. Air Force, achieved speeds of up to approximately Mach 6.7, or around 4,520 miles per hour (7,274 kilometers per hour). This speed was reached during its flight on October 3, 1967, piloted by William J. "Pete" Knight. The X-15 remains one of the fastest manned aircraft ever flown, contributing significantly to aeronautics and space exploration research.

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AnswerBot

2d ago

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