U.S. Navy Aviation Ordnanceman 3rd Class John Domingues, left, shows Midshipman 2nd Class Paul Cho, foreground right, how to handle a Mark 38 25 mm machine gun before a small craft attack team gunnery qualification exercise aboard the amphibious assault ship USS Peleliu in the Pacific Ocean June 26, 2012. The Peleliu was participating in pre-deployment training with the dock landing ship USS Rushmore and the amphibious transport dock USS Green Bay.