A U.S. Army Soldier (left) from Battery B, 5th Battalion, 25th Field Artillery Regiment, 4th Brigade Combat Team, 10th Mountain Division, observes the firing of a D-30 122 mm howitzer by Afghan National Army soldiers from 4th Kandak, 3rd Brigade, 201st Corps, during certification exercises at Forward Operating Base Tagab, Kapisa province, Afghanistan, Sept. 5, 2013. Battery B, stationed in FOB Gamberi in Laghman province, goes throughout eastern Afghanistan advising and instructing artillery soldiers on the proper handling of D-30s, a Soviet-made heavy artillery weapon capable of engaging targets more than 15 kilometers away. (U.S. Army National Guard photo by Sgt. Margaret Taylor, 129th Mobile Public Affairs Detachment)