International Navy ships sail off the coast of Hawaii during the Rim of Pacific Exercise (RIMPAC) 2018 in the Pacific Ocean. Twenty-six nations, more than 45 ships and submarines, about 200 aircraft, and 25,000 personnel are participating in RIMPAC, world's largest international maritime exercise, from June 27 to August 2, 2018 in and around the Hawaiian Islands and Southern California. RIMPAC 2018 is the 26th exercise in the series that began in 1971. Photo: AFP