DARPA and Boeing plan "to build and fly the first of an entirely new class of hypersonic aircraft that would bolster national security by providing short-notice, low-cost access to space," the military research and development organization said in a press release. "The program aims to achieve a capability well out of reach today – launches to low Earth orbit in days, as compared to the months or years of preparation currently needed to get a single satellite on orbit." (www.thedrive.com) 更多...
