National Security Journal on MSN

The Mach 6.7 X-15 Rocket Plane Has A Message for the U.S. Air Force

America built the X-15 to get flight data in the unknown between airplanes and spacecraft. -The rocket-powered, Inconel-X research plane, air-dropped from a B-52 and driven by a throttleable XLR99, ...
Ars Technica

A secretive space plane is set to launch and test quantum navigation technology

The X-37B, the US Space Force's secretive space plane, will soon take flight again. On Monday, the Space Force announced that it will fly the small, Space Shuttle-shaped vehicle on the program's ...