Marines Say Readying for Final Assault (Reuters) - U.S. marines said on Wednesday they were preparing a final assault on Iraqi Shi'ite militia in the holy city of Najaf, after a radical cleric urged his men to keep fighting even if he was killed. The warning came as sporadic clashes between U.S. troops and militia loyal to Moqtada al-Sadr echoed from the heart of Najaf, where hundreds have been killed or wounded in the past week around some of Iraq's holiest Shi'ite Muslim sites.