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Sailors clean the MK-45 5-inch/.54-caliber lightweight gun during an all-hands preservation call.
120124-N-OP638-043
ATLANTIC OCEAN (Jan. 24, 2012) Sailors clean the MK-45 5-inch/54-caliber lightweight gun during an all-hands preservation call aboard the Arleigh Burke-class guided-missile destroyer USS Porter (DDG 78). Porter is part of the Enterprise Carrier Strike Group, which is underway conducting a composite training unit exercise (COMPTUEX). (U.S. Navy photo by Mass Communication Specialist 3rd Class Jesse L. Gonzalez/Released)

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