4 / 17
Afghans shout slogans during anti-US protest over burning of Qurans at a military bass in Afghanistan, in Ghani Khail, east of Kabul Friday, Feb. 24,2012. (AP Photo/Rahmat Gul)

Afghans kill two US troops in latest attack

Two American soldiers were killed by Afghan colleagues on Thursday, the latest in a series of such attacks after the burning of Korans at a US base sparked widespread violent protests.