Photo by: Rodrigo Abd
US Army 2LT John Keller, of Downingtown, PA, from 1-320th Alpha Battery, 2nd Brigade of the 101st Airborne Division, directs mortar fire towards insurgent positions during clashes at COP Nolen, in the volatile Arghandab Valley, Kandahar, Afghanistan, Tuesday, July 27, 2010. (AP Photo/Rodrigo Abd)