US military forces. 180609JI086-312 MEDITERRANEAN SEA (June 9, 2018) Chief Gunner's Mate Michael Zimmerman, left, stands range safety officer watch as Lt. Alexander Davis fires an M240B machine gun during antiterrorism watch officer training aboard the Arleigh Burke-class guided-missile destroyer USS Porter (DDG 78) June 9, 2018. Porter, forward-deployed to Rota, Spain, is on its fifth patrol in the 6th Fleet area of operations in support of national security interests in Europe and Africa. ( Navy photo by Mass Communication Specialist 2nd Class Ford Williams/Released)

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Keywords: .., military, navy, service