U.S. Sailors assigned to the hospital ship USNS Mercy (T-AH 19), background, head toward the scene of a mock medical emergency during disaster response training July 10, 2014, at Joint Base Pearl Harbor-Hickam, Hawaii, as part of Rim of the Pacific (RIMPAC) 2014. RIMPAC is a U.S. Pacific Fleet-hosted biennial multinational maritime exercise designed to foster and sustain international cooperation on the security of the world?s oceans. (U.S. Navy photo by Mass Communication Specialist 3rd Class Justin W. Galvin/Released)