English: The Royal Australian Navy Collins-class submarine HMAS Sheean (SSG 77) arrives at Joint Base Pearl Harbor-Hickam after participating in Rim of the Pacific (RIMPAC) Exercise 2014. Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in RIMPAC from June 26 to Aug. 1, in and around the Hawaiian Islands and Southern California. The world's largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world's oceans. RIMPAC 2014 is the 24th exercise in the series that began in 1971. (U.S. Navy photo by Mass Communication Specialist 2nd Class Diana Quinlan/Released)