English: Canadian Army Bdr. Brad Wilson, First Royal Canadian Horse Artillery forward observer signalier, observes artillery impacts on a target area during a fire support exercise as part of Rim of the Pacific (RIMPAC) exercise July 25, 2014 at the Pohakuloa Training Area, Hawaii. Service members of the U.S. Marines, Australian Army, New Zealand Army and the Canadian Army, worked together during the exercise to coordinate aerial and mortar attacks during the scenario. Twenty-two nations, 49 ships, and six 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. Air Force photo by Staff Sgt. Christopher Hubenthal/Released)