Keywords: outdoor Lot-6080-4: German submarine, U-117 and U-140, aerial shown on June 18, 1921. They were sunk during the Billy Mitchell aircraft bombing tests on German and U.S. Navy ships, showing the vulnerability of ships to aerial bombing, July 18, 1921. Photograph from the William “Billy” Mitchell Collection. (2016/03/04). Lot-6080-4: German submarine, U-117 and U-140, aerial shown on June 18, 1921. They were sunk during the Billy Mitchell aircraft bombing tests on German and U.S. Navy ships, showing the vulnerability of ships to aerial bombing, July 18, 1921. Photograph from the William “Billy” Mitchell Collection. (2016/03/04). |