Afghan policemen walk ahead of the U.S. soldiers with the NATO- led International Security Assistance Force (ISAF) during a foot patrol in Kandahar, south of Kabul, Afghanistan, in this Jan. 7, 2012 file photo. In testimony prepared for delivery Wednesday Feb. 1, 2012 to the House Armed Services Committee, defense officials said that in most cases the Afghans acted out of personal motivation and were not controlled or directed by insurgent groups. The second most common circumstances involved insurgents impersonating or infiltrating Afghan security forces. (AP Photo/Allauddin Khan, File)
Read the article: Attacks by Afghans on US troops often personal
