Description:Supporters of Islamist President Mohamed Mursi and his opponents hurled rocks at each other in Egypt's second city of Alexandria on Friday. The Islamists had gathered in support of an Islamic vision of Egypt's future laid out in a draft constitution that will be put to a referendum on Saturday. Police fired tear gas as scores of opponents of the constitution and thousands of Islamists hurled rocks across a security cordon near a mosque that was the focus of violence last week.(0:37)