Una guardia della polizia afghana in servizio a Samir Kalacha

(AP Photo/Rodrigo Abd)

An Afghan police officer stands guard in Samir Kalacha during military operations by US Army soldiers from the 1-320th Alpha Battery, 2nd Brigade of the 101st Airborne Division and Afghan National Army in the volatile Arghandab Valley, Kandahar, Afghanistan, Wednesday, July 28, 2010.