BAGHDAD - The U.S. military said Sunday that attacks in Iraq with Iranian-made bombs have fallen off in recent days after a sharp but brief increase earlier in the month, and that the overall flow of weaponry from Iran has dropped. Meanwhile, a suicide bombing killed six people in western Iraq, the second such strike in as many days in Anbar province, where U.S.-backed Sunni tribes were said to have routed al-Qaida in Iraq last year. The attack near the city of Fallujah missed its target: a local tribal leader who is organizing resistance to the terror group. The Iranian...