151028-N-AX546-010 ADRIATIC SEA (Oct. 28, 2015) USS Porter (DDG 78) transits the Adriatic Sea as it approaches the port of Split, Croatia Oct. 28, 2015. Porter, an Arleigh Burke-class guided-missile destroyer, forward-deployed to Rota, Spain, is on a routine patrol conducting naval operations in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe. (U.S. Navy photo by Mass Communication Specialist 1st Class Sean Spratt/Released)