Riot police ask anti-Mursi protesters to disperse during clashes in front of the Presidential Palace "Qasr El-Quba" in Cairo February 15, 2013. Repeating the pattern of recent weeks, Mursi's opponents rallied again on Friday, this time gathering outside El-Quba, one of the presidential palaces in the northern suburbs of Cairo. The activists dubbed it "Checkmate Friday". - Reuters/Amr Abdallah Dalsh