180714-N-LI768-1148 PACIFIC OCEAN (July 14, 2018) Seaman Jeremy Gillentine, from Abilene, Texas, fastens his firefighting helmet during a general quarters drill aboard the guided-missile destroyer USS Dewey (DDG 105). Dewey is underway participating in the Rim of the Pacific (RIMPAC) exercise. Twenty-five nations, 46 ships, five submarines, and 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. The world's largest international maritime exercise, RIMPAC provides a unique training opportunity while fostering and sustaining cooperative relationships among participants critical to ensuring the safety of sea lanes and security of the world's oceans. RIMPAC 2018 is the 26th exercise in the series that began in 1971. (U.S. Navy photo by Mass Communication Specialist 2nd Class Devin M. Langer/Released)