ATLANTIC OCEAN (Nov. 16, 2021) Gunner�s Mate 2nd Class Kyle Graham fires an MK-38 25 mm machine gun system during a live-fire exercise aboard the aircraft carrier USS George H.W. Bush (CVN 77). George H.W. Bush provides the national command authority flexible, tailorable war fighting capability through the carrier strike that maintains maritime stability and security in order to ensure access, deter aggression and defend U.S. allied and partnered interests. (U.S. Navy photo by Mass Communication Specialist Seaman Apprentice Samuel Wagner)