151031-N-OQ305-074 PACIFIC OCEAN (Oct. 31, 2015) Hospital Corpsmen prepare a simulated patient for X-rays during a mass casualty drill aboard amphibious assault ship USS Boxer (LHD 4). Boxer Amphibious Ready Group (ARG), composed of Boxer, amphibious transport dock ship USS New Orleans (LPD 18), dock landing ship USS Harpers Ferry (LSD 49) and the 13th Marine Expeditionary Unit, is conducting a Composite Training Unit Exercise (COMPTUEX) to test their ability to effectively respond to scenario driven events and perform as an integrated unit in preparation for deployment. (U.S. Navy photo by Mass Communication Specialist 2nd Class Robert Sanchez/Released)