Air Force Photos

An X-51A WaveRider hypersonic flight test vehicle is uploaded to an Air Force Flight Test Center B-52 for fit testing at Edwards Air Force Base on July 17, 2009. Four scramjet-powered Waveriders were built for the Air Force. The Air Force Research Laboratory, DARPA, Pratt & Whitney Rocketdyne, and Boeing are partners on the X-51A technology demonstrator program. (U.S. Air Force photo/Chad Bellay)

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