The film is based on the biography of Valeri Chkalov (1904 - 1938), a Russian pilot, who set several long distance flight records. Chkalov and his co-pilots Baidukov and Belyakov together had accomplished several non-stop long-distance flights. In June of 1937 Chkalov set the world record, covering 12000 kilometers in 63 hours of non-stop flight from Moscow to Vancouver, Washington, flying over the North Pole.

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