A bomb hit a U.S. military vehicle Monday in central
Afghanistan, killing four American troops, the military said. The attack occurred in Dihrawud district, Uruzgan province, as the service members were patrolling in an armored Humvee, the military said in a statement. Shortly after the blast, militants fired at the troops with guns and rocket-propelled grenades. The military responded, calling in attack helicopters and fighter planes, it said. Full Story