National Security Journal on MSN

The Mach 3.08 XB-70 Valkyrie Bomber Has a Message for the U.S. Military

The XB-70 Valkyrie was born from a simple Cold War idea: fly so high and fast that nothing could touch you. North American’s ...
Dark Skies Official on MSN

The Mach 3 Bomber That Pushed The Limits

The North American XB-70 Valkyrie was a breathtakingly ambitious supersonic strategic bomber prototype developed for the U.S. Air Force in the late 1950s. Designed to fly at Mach 3 (over 2,000 mph) at ...