AdvertisementU.S. Faces Growing 'Insider Attacks' In AfghanistanAugust 23, 2012Tom BowmanfacebookEmailSpc. Ben Purvis (center) helps train Afghan troops on how to use mortars in the eastern province of Kunar in June. The top U.S. commander in Afghanistan, Gen. John Allen, points to several factors in the rise of "insider attacks" on American forces. He says relations between U.S. and Afghan troops are good overall. (Reuters/Landov)