XB-70 Valkyrie is the largest and fastest bomber that the US ever built. It was 185 feet long,105 feet wide And 30 feet tall. The XB-70 Valkyrie could cruise at Mach 3 and could hit altitudes of 70,000 feet. Related Article: XB-70 Valkyrie Mid-air collision with NASA F-104N Starfighter But the …
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