An junior officer poses with a 20mm gun on USS Yorktown (CV-5), during the morning of 4 June 1942. This gun is one of five in Yorktown's after port 20mm battery. Several SBD-3 Dauntless scout bombers are parked on the flight deck alongside these guns. Note the officer's leather jacket, goggles and barely visible rank bar on his collar. Also note the white rubber eye cup on the gun's open sight. These eye cups were still present on some of Yorktown's 20mm guns when she was examined in May 1998. Official U.S. Navy Photograph, now in the collections of the National Archives.