U.S. Coast Guard gunner's mates, with Maritime Force Protection Unit (MFPU) Kings Bay, fire blanks from an M2 .50-caliber machine gun during exercise Resolute Guardian 2012, aboard the Military Sealift Command submarine and special warfare support vessel MV HOS Black Powder near Kings Bay, Ga., Sept. 25, 2012. The mission of MFPU Kings Bay is to conduct escorts for ballistic missile submarines when transiting in and out of Kings Bay. (U.S. Navy photo by Mass Communication Specialist 1st Class James Kimber/Released)