A Marine with the 13th Marine Expeditionary Unit, Battalion Landing Team 1/4, fires the M777 howitzer during a battery defense battle drill at Arta Range, Nov. 3, 2013. A five-person gun crew can fire as many as five rounds per minute. The 13th MEU is deployed with the Boxer Amphibious Ready Group as a theater reserve and crisis response force throughout the U.S. 5th Fleet area of responsibility. U.S. Air Force photo by Staff Sgt. Staci Miller/Released.