171220-N-ZS023-059 INDIAN OCEAN (Dec. 20, 2017) A Mark 38 Mod. II machine gun system aboard the amphibious assault ship USS America (LHA 6) fires 25mm rounds during a live fire exercise on the starboard weather deck. America, part of the America Amphibious Ready Group, with embarked 15th Marine Expeditionary Unit, is operating in the Indo-Asia Pacific region to strengthen partnerships and serve as a ready-response force for any type of contingency. (U.S. Navy photo by Mass Communication Specialist 3rd Class Vance Hand/Released)