Keywords: outdoor monochrome Lot-6080-2: German submarine, U-117, shown before being 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-6080-2: German submarine, U-117, shown before being 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). |