The surviving North American XB-70 Valkyrie high-speed research aircraft is retired to the Air Force Museum at Wright-Patterson AFB, Ohio. The two XB-70s (one was destroyed after a midair collision) were flown 129 times for 252 hours and 28 minutes by seven contractor, Air Force, and NASA pilots. The two aircraft were flown at twice the speed of sound or better for nearly 52 hours.
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