Iraq's main Shia political bloc and supporters of firebrand cleric Muqtada al-Sadr signed a fragile ceasefire in Baghdad's Sadr City yesterday. The U.S. military has alleged that most Shia extremists fighting Iraqi and U.S. forces in the slum have splintered from Mr. al-Sadr's Mahdi Army, and that the cleric's level of influence on those rogue groups is unclear.
...