KABUL, Afghanistan (AP) — The 30 U.S. troops and eight Afghans who died in a helicopter crash in eastern Afghanistan were on a mission targeting a Taliban leader when an insurgent with a rocket-propelled grenade reportedly fired on the chopper and shot it down, U.S.-led coalition said Monday. The Chinook helicopter was transporting the troops to an ongoing battle early Saturday between coalition forces and insurgents in eastern Wardak province, NATO said in a statement. It was deadliest single loss for U.S. forces in the decade-long war.