Two CH-53E Super Stallion helicopters assigned to Marine Heavy Helicopter Squadron 463 take off after delivering Marines and Canadian soldiers as part of a noncombatant evacuation operation during Exercise Rim of the Pacific 2012 at Marine Corps Training Area Bellows, Hawaii, July 26, 2012. From June 29 to Aug. 3, more than 25,000 military personnel from 22 nations, 200 aircraft and 40 ships and submarines are participating in RIMPAC. The world's largest international maritime exercise, the 23rd in the series that began in 1971, is held biennially in and around the Hawaiian Islands. The exercise fosters training, interoperability and improved relations between countries providing security in sea lanes and oceans around the world.