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National Security Journal on MSN29m
The U.S. Air Force’s Big XB-70 Valkyrie Mach 3 Bomber Mistake Still Stings
The XB-70 Valkyrie was the U.S. Air Force’s bid to outrun Soviet defenses: a six-engine, compression-lift bomber built for sustained Mach 3 at extreme altitude. –National Security Journal recently ...
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