Quad 40mm antiaircraft guns firing aboard the U.S. Navy aircraft carrier USS Hornet (CV-12) in February 1945. (U.S. Navy Photograph.)
Tag - flak
Captured German artillery and flak collected in a Allied salvage dump in Tunisia, 1943. (U.S. Air Force Photograph.)
Boeing B-17 Flying Fortress flies through heavy flak over the target during World War II. (U.S. Air Force Photograph.)
Illustration of the M19 Twin 40-mm Gun Motor Carriage. (Source: U.S. War Department Technical Manual TM 9-1729A, 1944.)