On February 28th, a suicide bomber drives a sedan loaded with explosives into a crowd of army and police recruits waiting for medical examinations at a clinic in Hilla, 60 miles south of Baghdad. It is the single deadliest attack since the start of the warÑat least 122 are killed and 170 wounded. The bombing signals an escalating trend in Iraq: deadly violence directed at anyone cooperating with the U.S.-backed government.