The Defense Advanced Research Projects Agency (DARPA), the main research and development hub for the U.S. Department of ...

Blue Origin, owned by Jeff Bezos, plans to challenge SpaceX with the powerful, partially reusable New Glenn rocket.

The North American XB-70 Valkyrie embodied a once-dominant creed: outrun defenses at Mach 3 and 70,000 feet. -The prototype ...