171104-N-TK177-0035 ATLANTIC OCEAN (Nov. 4, 2017) Fire Controlman 2nd Class Miguel Rangel of Houston unlocks the barrels from the end barrel clamp on a close-in weapon system after a live-fire maintenance exercise aboard the amphibious assault ship USS Iwo Jima (LHD 7). Iwo Jima, components of the Iwo Jima Amphibious Ready Group and the 26th Marine Expeditionary Unit are conducting a Combined Composite Training Unit Exercise that is the culmination of training for the Navy-Marine Corps team and will certify them for deployment. (U.S. Navy photo by Mass Communication Specialist 1st Class Kristin M. Schuster/Released)