U.S. Army Staff Sgt. Samuel Feldman supervises as Sgt. Clarence Robinson raises the elevation of a howitzer during recertification training at Camp Ramadi, Iraq, July 31, 2011.

All 16 crews assigned to the 82nd Airborne Division's 2nd Battalion, 319th Airborne Field Artillery Regiment, 2nd Advise and Assist Brigade, must recertify every six months to keep their skills sharp. Feldman is a section chief and Robinson is a gunner.

Photo by U.S. Army Spc. Kissta Feldner