DOD scaling up effort to develop hypersonics: Spaceplane (XS-1) Phase 2/3 Concept Video
DOD scaling up effort to develop hypersonics By David Vergun DOD News, The Defense Department is looking to step up its development of hypersonic weapons — missiles that travel more than five times faster than the speed of sound — DOD leaders said at the National Defense Industrial Association-sponsored “Hypersonics Senior Executive Series” here today. …