21st Bombardment Squadron B-24 Liberator Amchitka Alaska Mar 1943.  Sleds were used to transport bombs to the aircraft in the snow.
United States Army Air Forces
1943
USAAF photo via Chloe, John Hale, (1984), Top Cover for America. the Air Force in Alaska. 1920–1983, Pictorial Histories Publishing Company, <a href="//commons.wikimedia.org/wiki/Special:BookSources/0-933126-47-6" title="Special:BookSources/0-933126-47-6">ISBN 0-933126-47-6</a>