From: Danger Room

During the past several weeks, Afghan forces have turned their guns on the U.S. troops that mentor them with increasing frequency. The Afghan troops have killed at least 40 U.S. and allied forces this year, the most since the war began, and Karzai’s government insists the blame lies with Pakistani infiltrators, not Afghans themselves. Allen diplomatically said he was “looking forward to the Afghans providing us with the intelligence” they’re using to reach that conclusion.