171118-N-BK384-102 MEDITERRANEAN SEA (Nov. 18, 2017) Staff Sgt. John Trickler, from Townsend briefs Marines assigned to the 15th Marine Expeditionary Unit (15th MEU) before a low light live-fire exercise aboard the San Antonio-class amphibious transport dock ship USS San Diego (LPD 22). San Diego is deployed with the America Amphibious Ready Group, with the embarked 15th MEU, 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)