National Security Journal on MSN

SR-72 Darkstar: The US Air Force’s new Mach 6 hypersonic bomber?

SR-72 “Darkstar”: The Mach 6 Successor to the SR-71 That Could Also Strike Summary and Key Points: The SR-71 remains the ...
National Security Journal on MSN

Sorry, B-21 Raider: Mach 3.08 XB-70 Valkyrie bomber has a message for the US Air Force

Mach 3.08 At 74,000 Feet: The XB-70’s Peak Moment Summary and Key Points: The lone surviving XB-70 Valkyrie—North American’s ...