Supporters of Egypt's Islamist President-elect Mohamed Mursi celebrate after his speech in Cairo's Tahrir Square, June 29, 2012. Mursi took an informal oath of office on Friday before tens of thousands of supporters in Cairo's Tahrir Square, in a slap at the generals trying to limit his power. REUTERS/Amr Abdallah Dalsh (EGYPT - Tags: POLITICS CIVIL UNREST)