Machine Gun Blast Marines fire a .50-caliber machine gun mounted to an amphibious assault vehicle during a multinational training exercise at Marine Corps Air Ground Combat Center Twentynine Palms, Calif., Aug. 17, 2017. Marine Corps photo by Lance Cpl. Taylor Cooper SHARE: Download: Full Size (3.71 MB) Credit: Lance Cpl. Taylor Cooper VIRIN: 170817-M-AM926-189C.JPG Photo Gallery