US soldiers from 1-320th Alpha Battery, 2nd Brigade of the 101st Airborne Division, run to firing positions after coming under attack by Taliban insurgents at COP Nolen, in the volatile Arghandab Valley, Kandahar, Afghanistan, Tuesday, July 27, 2010. (AP Photo/Rodrigo Abd)

Photo by: Rodrigo Abd

US soldiers from 1-320th Alpha Battery, 2nd Brigade of the 101st Airborne Division, run to firing positions after coming under attack by Taliban insurgents at COP Nolen, in the volatile Arghandab Valley, Kandahar, Afghanistan, Tuesday, July 27, 2010. (AP Photo/Rodrigo Abd)