171024-N-IA905-1144 PACIFIC OCEAN (Oct. 24, 2017) Yeoman 3rd Class Jalen J. Mathena fires a .50 caliber machine gun as Gunner’s Mate 2nd Class Kyle A. Bonsiero observes his performance during a training exercise aboard the Arleigh Burke-class guided-missile destroyer USS Preble (DDG 88). The ship is deployed with the Theodore Roosevelt Carrier Strike Group, conducting maritime security, forward presence and theater security operations in the U.S. 7th Fleet area of operations. (U.S. Navy photo by Mass Communication Specialist Seaman Morgan K. Nall/Released)