An Egyptian plainclothes security personnel fires a cartridge at Al-Azhar University students who support the Muslim Brotherhood and deposed President Mohamed Mursi, at the university's campus in Cairo, Egypt, Sunday, Dec. 29, 2013. Students of Egypt's main Islamic university said they were prevented from taking their exams on Sunday by fellow students who support the Muslim Brotherhood. The comments were made outside al-Azhar University's Faculty of Commerce, which was set on fire a day earlier. Photo by Mohammed Bendari