180813-N-WO404-262 BLACK SEA (Aug. 13, 2018) Vice Adm. Lisa M. Franchetti, commander, U.S. 6th Fleet and commander, Naval Striking and Support Forces NATO, left, and Bulgarian Rear Adm. Mitko Petev, Bulgarian Navy chief of naval operations, stand on a Bulgarian Navy patrol boat during a swarming exercise with the Arleigh Burke-class guided-missile destroyer USS Carney (DDG 64) in the Black Sea. U.S. 6th Fleet, headquartered in Naples, Italy, conducts the full spectrum of joint and naval operations, often in concert with allied and interagency partners, in order to advance U.S. national interests, security and stability in Europe and Africa. (U.S. Navy photo by Mass Communication Specialist 2nd Class Jonathan Nelson/Released)