Cairo carnage: Over 500 dead in crackdown

Egypt's defiant Muslim Brotherhoodtoday stormed and torched local government offices as theybegan a march from the Al-Iman mosque here, a day after over638 people were killed in the deadliest crackdown by securityforces on supporters of ousted President Mohammed Morsi.The health ministry spokesman said death toll fromnationwide violence in Egypt has climbed to 638, making it thebloodiest day since the Arab Spring in 2011 toppled longtimePresident Hosni Mubarak in a popular uprising.