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#Onthisday in 1941, San Francisco Airport became an U.S. Army Air Corps training and staging facility. At the outbreak of World War II in the Pacific, fortified revetments were installed on the airfield to protect aircraft from attack. While commercial airlines were permitted to operate under wartime conditions, all civilian flying was suspended. Image: Douglas C-47 military transport at San Francisco Airport, c. 1943. Gift of Charles Loomis. 2005.062.013 a b This image was posted on December 07, 2017.

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