MACHINE GUN GUNNER U.S. Navy sailors serving as gunners mates aboard the guided-missile cruiser USS Lake Champlain fire a .50 caliber machine gun during a live-fire exercise in the Pacific Ocean, July 25, 2009. The Lake Champlain is on a scheduled deployment as part of the Boxer Amphibious Ready Group in the U.S. 3rd Fleet area of responsibility. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 191687-R-LVF60-501.jpg Photo Gallery