150303-N-NM917-884 PACIFIC OCEAN Gunner's Mate 1st Class Juan Abney observes as Gunner's Mate Seaman Aaron Cook, both assigned to the U.S. 7th Fleet flagship USS Blue Ridge, prepares to fire an MK-38 25-mm machine gun off the main deck during live-fire exercise. Blue Ridge is currently conducting sea trials in preparation for resuming patrols in the 7th Fleet area of operations.