Four U.S. soldiers were killed in separate attacks in the capital this weekend, including three in a single roadside bombing, the military said Monday, pushing the death toll past 100 in the deadliest month so far this year. Both attacks occurred in eastern Baghdad, a predominantly Shiite area where American and Iraqi forces have stepped up their activities as part of a security crackdown that began on Feb. 14 to quell the sectarian violence. Full Story