A suicide bomber blew himself up at a park Wednesday in northern Afghanistan, killing at least 10 people, including two U.S. soldiers, officials said, the latest in a string of attacks as spring fighting season gets under way.
Afghan and NATO security forces have frequently been targeted in the surge of violence as militants fight to assert their power and undermine U.S. efforts to try to build up the Afghan military and leave combat responsibility to local forces by the end of 2014. . .