The U.S. military's new nemesis in Iraq is named Abu Mustafa al-Sheibani, and he is not a Baathist or a member of al-Qaeda. He is working for Iran. According to a U.S. military-intelligence document obtained by Time, al-Sheibani heads a network of insurgents created by the Iranian Revolutionary Guard Corps with the express purpose of committing violence against U.S. and coalition forces in Iraq. O ver the past eight months, his group has introduced a new breed of roadside bomb more lethal than any seen before; based on a design from the Iranian-backed Lebanese militia Hizballah, the weapon employs "shaped"...