DARPA Fires Up XS-1 Space Plane Quest September 18, 2013/Client: /by spireco1DARPA Fires Up XS-1 Space Plane Quest spireco1 https://spirecommunications.com/wp-content/uploads/2017/12/SpireLogo-300x138.png spireco12013-09-18 20:11:412013-09-18 20:11:41DARPA Fires Up XS-1 Space Plane Quest