TEHRAN, Iran (AP) - The exiled leader of the biggest Iraqi opposition group called Thursday on Iraqis to converge in the Shiite holy city of Karbala to oppose a U.S.-led interim administration and defend Iraq's independence. Ayatollah Mohammed Baqir al-Hakim, leader of the Supreme Council of the Islamic Revolution of Iraq, chose the southern Iraqi city and the date - next Tuesday - because of their connections to Hussein, the grandson of Islam's Prophet Muhammad and one of Shiite Islam's most revered heroes. "I call on Iraqis to converge in Karbala to oppose any sort of foreign domination and support...