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Archive: Day: August 6, 2021

Experimental: History & Heritage of the North American XB-70 Valkyrie The XB-70 Valkyrie started as a prototype for the B-70, a high-altitude, nuclear strike bomber. The Valkyrie had six engines that allowed the aircraft to fly at Mach 3+, which is three times the speed of sound. No such enemy could defend against a bomber

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