Cmdr. Darren Dugan, commanding officer, USS Jason Dunham (DDG 109) conducts an on-camera interview with Estonian media July 8, 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. (U.S. Navy photo by Mass Communication Specialist 3rd Class Weston Jones/Released)

150508-N-FQ994-161 MEDITERRANEAN SEA (May 8, 2015) USS Ross (DDG 71) transits the Mediterranean Sea May 8, 2015. Ross, an Arleigh Burke-class guided-missile destroyer, forward-deployed to Rota, Spain, is 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 3rd Class Robert S. Price/Released)

Boatswain's Mate Seaman Jon Parker, from Warren, Ohio, center, signals to pilots operating an MH-60R Sea Hawk helicopter assigned to Helicopter Maritime Strike Squadron (HSM) 46, while Aviation Electronics Technician 3rd Class Logan Smith, from Jacksonville, Florida, disconnects a data link from the aircraft prior to take-off aboard USS Jason Dunham (DDG 109) April 17, 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. (U.S. Navy photo by Mass Communication Specialist 3rd Class Weston Jones/Released)