ON WATCH — U.S. Army Pfc. Pedro Rangel provides security with an M240B machine gun from a rooftop while fellow soldiers begin work on building the new combat out post in Ghazaliya, Iraq, Jan. 14, 2007. Rangel is with Charlie Company, 2nd Battalion, 12th Cavalry Regiment, 1st Cavalry Division. U.S. Army photo by Sgt. Martin K. Newton