Egyptians security forces escort an Islamist supporter of the Muslim Brotherhood out of the al-Fatah mosque and through angry crowds, after hundreds of Islamist protesters barricaded themselves inside the mosque overnight, following a day of fierce street battles that left scores of people dead, near Ramses Square in downtown Cairo, Egypt, Saturday, Aug. 17, 2013. (AP Photo/Hussein Tallal)

Egyptians security forces escort an Islamist supporter of the Muslim Brotherhood out of the al-Fatah mosque and through angry crowds, after hundreds of Islamist protesters barricaded themselves inside the mosque overnight, following a day of fierce street battles that left scores of people dead, near Ramses Square in downtown Cairo, Egypt, Saturday, Aug. 17, 2013. (AP Photo/Hussein Tallal)