Iraq Cleric Urges Fighters to Drop Arms NAJAF, Iraq - Thousands of pilgrims streamed into the Imam Ali Shrine on Friday and filed out mixed with militants who had been holed up inside, leaving the holy site nearly empty after Iraq's top Shiite cleric brokered a peace deal to end three weeks of fighting in this holy city.    Hours earlier, firebrand Shiite cleric Muqtada al-Sadr issued a statement broadcast over the shrine's loudspeakers, ordering his fighters to lay down their arms and leave Najaf and neighboring Kufa...