180630-M-ZO893-1078 MARINE CORPS BASE HAWAII (June 30, 2018) Sri Lankan Marines practice operating a Mark 19 40 mm machine gun during Rim of the Pacific (RIMPAC) exercise on Marine Corps Base Hawaii. RIMPAC provides high-value training for task-organized, highly-capable Marine Air-Ground Task Force and enhances the critical crisis response capability of U.S. Marines in the Pacific. Twenty-five nations, 46 ships, five submarines, about 200 aircraft and 25,000 personnel are participating in RIMPAC from June 27 to Aug. 2 in and around the Hawaiian Islands and Southern California. (U.S. Marine Corps photo by Sgt. Zachary Orr/Released)