https://www.space.com/30196-xs1-military-space-plane-boeing-contract.html
US Military Awards New Contracts for XS-1 Space Plane | Space
Aug 7, 2015 - The Defense Advanced Research Projects Agency (DARPA) awarded Boeing, Northrop Grumman and Masten Space Systems new contracts to continue their work under...
us military awardsnew contractsxs 1spaceplane