U.S. soldiers on patrol in Afghanistan in 2009, photo by U.S. Dept of Defense

U.S. Army soldiers with the 4th Battalion, 23rd Infantry Regiment, 5th Brigade Combat Team, 2nd Infantry Division and Afghan National Army soldiers conduct a combined patrol in the village of Shabila Kalan, Zabul, Afghanistan, on Nov. 30, 2009. DoD photo by Tech. Sgt. Efren Lopez, U.S. Air Force. (Released)