Egyptian students of al-Azhar university run for cover from a tear gas canister fired by riot police during clashes outside their university campus in Cairo on October 20, 2013 following an anti-army protest. About 3,000 students initially blocked the main Nasr road leading to the Islamic university’s campus, and clashed with police who arrived to persuade them to leave, the interior ministry said in a statement. AFP PHOTO / KHALED DESOUKI