A U.S. soldier, center, with the NATO- led International Security Assistance Force, ISAF, stands guard during a graduation ceremony of Afghan police security forces in Herat west of Kab

 

              A U.S. soldier, center, with the NATO- led International Security Assistance Force, ISAF, stands guard during a graduation ceremony of Afghan police security forces in Herat west of Kab
A U.S. soldier, center, with the NATO- led International Security Assistance Force, ISAF, stands guard during a graduation ceremony of Afghan police security forces in Herat west of Kabul, Afghanistan, Thursday, Dec. 20, 2012. Over 200 police security forces including eight female policewomen graduated after receiving six months of training in Herat. The process of taking over security from the NATO-led ISAF forces by Afghan troops should be completed by the end of 2014, when Afghanistan will take over the full leadership of its own security duties from U.S. and NATO forces. (AP Photo/Hoshang Hashimi)