Hospital Corpsman 2nd Class George Busto, from Delano, Calif., updates a medical status board during a mass casualty drill in a hangar bay aboard the amphibious assault ship USS Peleliu (LHA 5). Twenty-three nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in RIMPAC exercise from June 26 to Aug. 1, in and around the Hawaiian Islands. 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 3rd Class Katarzyna Kobiljak/Released)