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BALTIC SEA – Two Russian Sukhoi Su-24 attack aircraft fly over the USS Donald Cook (DDG 75) Apr. 12, 2016. Donald Cook, an Arleigh Burke-class guided-missile destroyer, forward deployed to Rota, Spain is conducting a routine patrol in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe. (U.S. Navy photo/Released)