150701-N-IN729-136 PACIFIC OCEAN (July 01, 2015) – Sailors perform patient triage during a mass casualty drill aboard the aircraft carrier USS Ronald Reagan (CVN 76). Mass casualty drills help ensure mission readiness and fast medical response. Reagan is underway off the coast of southern California. (U.S. Navy photo by Mass Communication Specialist 3rd Class Ryan McFarlane/Released)