U.S. sailors prepare to transport a sailor role-playing as a casualty to a medical triage during a mass casualty drill aboard the amphibious assault ship USS Peleliu (LHA 5) under way in the Pacific Ocean Aug. 5, 2012. Peleliu and its amphibious ready group are conducting a composite training unit exercise, a predeployment certification that evaluates a ship's ability to conduct military operations at sea and support expeditionary operations ashore. (U.S. Navy photo by Mass Communication Specialist Seaman Dustin Knight)