3 of 50: Anti-government protestors pray around the bodies of the demonstrators who were killed on Friday's clashes with Yemeni security forces, during their funeral procession in Sanaa,Yemen, Sunday, March 20, 2011. The Yemeni president's own tribe has called on him to step down after a deadly crackdown on protesters, robbing the embattled U.S.-backed leader of vital support in a society dominated by blood ties. (AP Photo/Muhammed Muheisen)

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