KABUL, Afghanistan (AP) - Furious parents of Afghan children killed by a stray mortar fired during a U.S. military training drill accused American special forces Tuesday of ignoring their desperate pleas and letting their sons bleed to death. Four boys died and three were injured in Saturday's incident at a firing range about six miles east of Kabul. The accident occurred as the U.S. 5th Battalion, 19th Special Forces Group from Fort Carson, Colo., was training Afghan soldiers in mortar and rifle fire. The U.S. military says it is investigating and denies there was any delay in helping the injured...