190809-N-SR275-0319 VARNA, Bulgaria (Aug. 9, 2019) Cmdr. Craig Trent, commanding officer of the Arleigh Burke-class guided-missile destroyer USS Porter (DDG 78), walks with Bulgarian Capt. Nedko Dimitrov, dean of Nikola Vaptsarov Naval Academy (NVNA), at NVNA in Varna, Bulgaria, Aug. 9, 2019. Porter, forward-deployed to Rota, Spain, is on its seventh patrol in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe and Africa. (U.S. Navy photo by Mass Communication Specialist 3rd Class T. Logan Keown/Released)