150416-M-YH418-026 GULF OF ADEN (April 16, 2015) – U.S. Navy Hospital Corpsmen with the 24th Marine Expeditionary Unit and Iwo Jima Amphibious Ready Group members treat a simulated casualty during a mass casualty exercise aboard the amphibious transport dock ship USS New York (LPD 21), April 16, 2015. The 24th MEU is embarked on the ships of the Iwo Jima ARG and is deployed to maintain regional security in the U.S. 5th Fleet area of operations. (U.S. Marine Corps photo by Cpl. Todd F. Michalek/Released)