National Security Journal on MSN

The Mach 6 SR-72 Darkstar ‘Scramjet’ Has a Message for the U.S. Air Force

The secretive SR-72 “Darkstar” is Lockheed Martin’s ambitious project to build a Mach 6+ hypersonic ISR and strike aircraft. ...
Morning Overview on MSN

NASA’s X-43A hypersonic jet still stuns engineers today

A, a groundbreaking hypersonic scramjet vehicle, achieved an unprecedented speed of Mach 9.6, solidifying its status as the fastest atmospheric combustion-engine air vehicle in the world. This ...