Muslim brotherhood members and supporters of ousted president Mohammed Morsi take part in a demonstration against the army-installed government on September 10, 2013 in Cairo, Egypt. A series of attacks in Egypt's restive Sinai peninsula over the past 24 hours, mostly against soldiers, killed at least four people, security officials said. The flag at background shows the "Rabaa sign", done by raising four fingers, which is the symbol of the deadly crackdown in Egypt and Rabaa al-Adawiya Square in Cairo.  AFP PHOTO/ MAHMOUD KHALED        (Photo credit should read MAHMOUD KHALED/AFP/Getty Images)