Not seen one on a trailer before , was it common practice?
Caption for the pic,
""General Ike"
Boeing B-17G-40-BO Flying Fortress
Serial number 42-97061
401st Bomb Squadron, 91st Bomb Group, 8th Air Force
I believe this is a pilot getting dunked after finishing his tour.
The man getting dunked is Maj. James H. McPartlin, the commanding officer of the 401st Bomb Squadron, 91st Bomb Group.