keywords: tanks najaf shrine iraqi iraqis
text: U.S. Tanks Move Toward Najaf Shrine, Clashes Kill 40  NAJAF, Iraq (Reuters) - U.S. tanks rumbled to within 800  meters (yards) of a holy shrine in the Iraqi city of Najaf on  Sunday as fierce clashes with Shi'ite rebels in a nearby town  killed at least 40 Iraqis, officials said.