Security guards patrol in the neighborhood of anti-U.S. Shi'ite cleric Moqtada al-Sadr in Najaf province January 7, 2011. Sadr's security detail has a disciplined quality far removed from his old Mehdi Army militia, hinting at his evolution towards the mainstream that could help stabilise Iraq. Bearded men in black shirts and grey suits with pistols strapped to their belts, and others dressed like professional mercenaries, have knitted a tight circle around him since his return on Thursday after years of voluntary exile in Iran. REUTERS/Mohammed Ameen (IRAQ - Tags: POLITICS CIVIL UNREST)