A formation of Douglas B-18s of the 19th Bomb Group, 32nd Bomb Squadron, embarks on a training mission in September 1938. (U.S. Air Force)
U.S. Air Force
A formation of Douglas B-18s of the 19th Bomb Group, 32nd Bomb Squadron, embarks on a training mission in September 1938. (U.S. Air Force)
U.S. Air Force