National Security Journal on MSN
The U.S. Military’s Superpower Muscles Are Getting Old
As the Pentagon races to field the B-21 Raider, F-47 NGAD fighter, SSN(X) subs and F/A-XX, Operation Midnight Hammer offered ...
National Security Journal on MSN
The Mach 6.7 X-15 ‘Hypersonic Rocket Plane’ Has a Message for the U.S. Air Force
The X-15 was a rocket-powered research aircraft that pushed human flight to the edge of space and deep into the hypersonic ...
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