A man is silhouetted against the sunset as Egyptian military jets fly in formation over Tahrir square in Cairo July 4, 2013. The leader of the Muslim Brotherhood was arrested by Egyptian security forces on Thursday in a crackdown against the Islamist movement after the army ousted the country's first democratically elected president Mohamed Morsi. Adli Mansour, head of Egypt's constitution court, was sworn in as the interim head of state on Friday. [Photo/Agencies]