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Ahead of its time - the XB-70 Valkyrie could travel at three times the speed of sound. Over more than a half century after its first flight, the XB-70 is still one of aviation's most interesting achievements.

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current00:32, October 4, 2016Thumbnail for version as of 00:32, October 4, 2016480 × 269 (15 KB)Chiltern Hills1 (Talk | contribs)created video