Iraq: Millions mark Shiite holiday in holy city of Karbala An estimated two million Shiite faithful gathered in Karbala, site of the mausoleum of Imam Hussein, grandson of the Prophet Mohammed, whose death in the city lies at the heart of Islam's sectarian divide. To commemorate the occasion, devotees flood Hussein's mausoleum, demonstrating their ritual guilt and remorse for not defending him by beating their heads and chests. Images