Osama Bin Laden Death Raises Vengeance Fears

World leaders warned of revenge attacks after Osama bin Laden was killed in a U.S. assault in Pakistan on Monday that brought to a dramatic end the long manhunt for the al Qaeda leader who had become the most powerful symbol of Islamist militancy.

President Barack Obama declared the world was a safer and "better place" with bin Laden dead. But the euphoria that drew flag-waving crowds to "Ground Zero" of the September 11, 2001, attack in New York was tempered by calls for vigilance against retaliation by his followers.

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