National Security Journal on MSN

Mach 6 ‘Miracle’ SR-72 Darkstar Has a Message for Russia or China

The SR-71 retired in 1999, but its rumored successor—the SR-72 “Darkstar”—keeps resurfacing. -Lockheed’s Skunk Works has ...
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. ...