The first serious attempt to use airplanes in the Arctic occurred in 1923 when Norwegian explorer Roald Amundsen--who in 1911 had been the first person to reach the South Pole--tried to fly from Wainwright, Alaska to Spitsbergen with fellow Norwegian Oscar Omdal. Unfortunately, Amundsen and Omdal's aircraft became damaged and they had to abandon their journey. On May 9, 1926, Byrd and pilot Floyd Bennett attempted a flight over the North Pole in a Fokker F-VII Tri-motor called the Josephine Ford. This flight went from Spitsbergen (Svalbard) and back to its take-off airfield. Byrd claimed to have reached the Pole. From 1926 until 1996, there were doubts, defenses, and heated controversy about whether or not Byrd actually reached the North Pole. In 1958 Norwegian-American aviator and explorer Bernt Balchen cast doubt on Byrd's claim based on his extensive personal knowledge of the airplane's speed. In 1971 Balchen speculated that Byrd had simply circled aimlessly while out of sight of land.