150403-N-ZE250-106 BOSPHORUS STRAIT A Turkish Coast Guard vessel escorts USS Jason Dunham through the Bosphorus Strait as it navigates toward the Black Sea April 3, 2015. Jason Dunham, an Arleigh Burke-class guided-missile destroyer, homeported in Norfolk, is conducting naval operations in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe.