text: Clashes Erupt in Najaf Despite Peace Plan NAJAF, Iraq - Sporadic gunfire and explosions boomed through Najaf on Thursday despite a peace deal in which radical cleric Muqtada al-Sadr agreed to disarm his militiamen and pull them out of a revered Shiite shrine they've been taking refuge in.    As clashes in Najaf continued, Arab television station Al-Jazeera aired a video Thursday showing a militant group that called itself the Martyrs Brigade vowing to kill a missing Western journalist if U.S...