171103-N-BK384-484 MEDITERRANEAN SEA (Nov. 3, 2017) The San Antonio-class amphibious transport dock ship USS San Diego (LPD 22) fires its Mark 46 30mm gun during a live-fire exercise. San Diego is deployed with the America Amphibious Ready Group and the 15th Marine Expeditionary Unit to support maritime security and theater security cooperation in efforts in the U.S. 6th Fleet area of operations. (U.S. Navy photo by Mass Communication Specialist 3rd Class Justin A. Schoenberger/Released)