A member of the Muslim Brotherhood and supporter of ousted Egyptian president Mohamed Mursi carries his friend and shouts slogans in front of al-Salam mosque against the military and interior ministry as they march towards Rabaa al-Adawiya, during a protest named "Friday of Loyalty to the Blood of the Martyrs" at Cairo's Nasr City district, September 13, 2013. Al Qaeda leader Ayman al-Zawahri has described the army-installed government's crackdown against the Muslim Brotherhood in Egypt as a "brutal crime" and urged Egyptians to resist what he called a campaign against Islam in their country. Many were killed when the security forces, who regard the Brotherhood as terrorists, attacked its supporters on August 14 in a raid on pro-Mursi protest camps in Cairo. Headband reads, "Rabaa Withstand". REUTERS/Amr Abdallah Dalsh (EGYPT - Tags: POLITICS CIVIL UNREST)