Prepare to fire

From left, U.S. Marine Corps Cpl. Liji Sui, Sgt. Richard West and Lance Cpl. Kirby Salmans, all with Battalion Landing Team 3/8, 26th Marine Expeditionary Unit, Regimental Combat Team 8, prepare to fire a 120mm mortar at Combat Outpost Ouellette, Helmand province, Afghanistan, March 6, 2011. This was the first time the new Advanced Field Artillery Tactical Data System's Ballistic Computer 11 software was used in the field. The 26th Marine Expeditionary Unit is deployed to Afghanistan in support of the International Security Assistance Force. (DoD photo by Gunnery Sgt. Bryce Piper, U.S. Marine Corps/Released)