Terrorism & Security How France's threat to pull out of Afghanistan could impact NATO

In a tough day for NATO troops in Afghanistan, a man in an Afghan military uniform kills four French troops and a helicopter accident costs other NATO troops' lives. 

Charles Platiau/AP

At least four French troops are dead and more injured after someone wearing an Afghan military uniform turned his weapon against NATO forces. It’s the latest in an increasing number of such incidents and could further strain relations between NATO and Afghan officials.