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Discovery Channel-Great Planes: North American XB-70 Valkyrie (2002)
Discovery Channel-Great Planes: North American XB-70 Valkyrie (2002)
Great Planes looks into the stories behind the most influential, innovative and intriguing machines that ever took flight.
Even a supersonic plane can be a lemon. Engineers had tried to build a supersonic bomber since World War II, and finally completed the XB-70 Valkyrie in 1964.