First trans–polar flight: A Tupolev ANT-25RD flown by Valery Pavlovich Chkalov with copilot Georgi Filippovich Baidukov and navigator Alexander Vasilyevich Belyakov from Schelkovo air base on the outskirts of Moscow, to Pearson Field in Vancouver, Washington, crossing the Arctic for the first time from June 18–20, 1937 over a distance of 9130 kilometers in 63 hours and 25 minutes.