FILE - In this Feb. 24, 2012 file photo, Afghans burn an effigy representing U.S. President Barack Obama during an anti-U.S. protest in Ghani Khail, east of Kabul, Afghanistan over the burning of Qurans at a U.S. military base. Two U.S. troops were gunned down by an Afghan soldier and his accomplice Thursday, March 1, 2012, the latest of six American service members killed by their Afghan partners since the burning of Muslim holy books last week sent anti-Americanism soaring in a nation that has long distrusted foreigners. (AP Photo/Rahmat Gul, File)