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Marines with the Force Reconnaissance Detachment, 11th Marine Expeditionary Unit, execute close quarters combat drills on the flight deck of the USS San Diego as part of low-light, live-fire sustainment training conducted during Composite Training Unit Exercise (COMPTUEX) off the coast of southern California, May 18, 2014. COMPTUEX provides the 11th MEU, along with the Makin Island Amphibious Ready Group, the opportunity to conduct command and control of amphibious operations from the sea. (U.S. Marine Corps photo by Gunnery Sgt. Rome M. Lazarus/Released)