ATLANTIC OCEAN (Sep. 3, 2018) A Mark-46 30 mm gun aboard the amphibious transport dock ship USS Arlington (LPD 24) fires at a target during a live-fire exercise during the Carrier Strike Group (CSG) 4 Amphibious Ready Group, Marine Expeditionary Unit exercise (ARGMEUEX). Kearsarge Amphibious Ready Group and 22nd Marine Expeditionary Unit are enhancing joint integration, lethality and collective capabilities of the Navy-Marine Corps team through joint planning and execution of challenging and realistic training scenarios. CSG-4 mentors, trains and assesses East Coast units preparing for future deployments. (U.S. Navy photo by Mass Communication Specialist 2nd Class Brandon Parker)