U.S. forces move closer to one of Shiite Islam's most sacred sites, the Imam Ali shrine in the city of Najaf. Militiamen loyal to radical Shiite cleric Muqtada al-Sadr engage in fierce firefights in the vast cemetery surrounding the shrine with U.S. troops backed by tanks. There are reports the shrine may be damaged by the fighting. NPR's Eric Westervelt reports from Baghdad.
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