The United States does not have proof that Iran’s government is responsible for the presence of Iranian weapons and military personnel in Iraq, the top U.S. military officer said on Tuesday. Defense Secretary Donald Rumsfeld also said the United States may slightly increase its troops in Iraq from the current 133,000 to provide more security for an upcoming Shi’ite pilgrimage amid worry about further sectarian violence. President George W. Bush said on Monday components from Iran were being used in powerful roadside bombs used in Iraq, and Rumsfeld said last week that Iranian Revolutionary Guard personnel had been inside Iraq to stir up trouble. Full Story