160922-N-RM689-290 PACIFIC OCEAN (Sept. 22, 2016)- Sailors assigned to guided-missile destroyer USS Dewey (DDG 105) fire the ship's MK 45 5-inch gun, during a training exercise. Dewey is currently underway in the Pacific Ocean certifying in various warfare areas in preparation for deployment. (U.S. Navy photo by Mass Communication Specialist 3rd Class Kelsey L. Adams/Released)