AFGHAN SOLDIER KILLS U.S. TRAINERS

"An Afghan soldier opened fire on U.S. civilian trainers at an army base in northern Afghanistan, killing two Americans and another Afghan troop... An argument started during a weapons-training exercise and the Afghan soldier turned his gun on the Americans... The shooter was a "group leader" — an Afghan soldier selected to train other soldiers on the base..."
http://www.time.com/time/world/article/0,8599,2005386,00.html