U.S. Marines with low altitude air defense section,

U.S. Marines with low altitude air defense section, Marine Medium Tiltrotor Squadron (VMM) 263 (Reinforced), 22nd Marine Expeditionary Unit (MEU), wait to move to the firing line during a live-fire range aboard the amphibious assault ship USS Bataan (LHD 5). The 22nd MEU is deployed with the Bataan Amphibious Ready Group as a theater reserve and crisis response force throughout the U.S. Central Command and the U.S. 5th Fleet area of responsibility. (U.S. Marine Corps photo by Sgt. Alisa J. Helin/Released)