150218-N-KB426-030 ARABIAN GULF Military Sealift Command fleet replenishment oiler USNS Walter S. Diehl transits the Arabian Gulf during a replenishment at sea with aircraft carrier USS Carl Vinson. Vinson is deployed as part of the Carl Vinson Strike Group supporting maritime security operations, strike operations in Iraq and Syria as directed, and theater security cooperation efforts in the U.S. 5th Fleet area of responsibility.