170912-N-UY653-191 ARCTIC CIRCLE (Sept. 12, 2017) The Arleigh Burke-class guided-missile destroyer USS Oscar Austin (DDG 79) fires its Mark 38 25 mm machine gun during a live-fire exercise in the Arctic Circle, Sept. 12, 2017. Oscar Austin is on a routine deployment supporting U.S. national security interests in Europe, and increasing theater security cooperation and forward naval presence in the U.S. 6th Fleet area of operations. (U.S. Navy photo by Mass Communication Specialist 2nd Class Ryan U. Kledzik/Released)