Tensions escalate in Egypt
An anti-Mursi protester runs while throwing a tear gas canister, which was earlier thrown by riot police, during clashes in front of the presidential palace in Cairo, December 4, 2012. Egyptian police battled thousands of protesters outside President Mohamed Mursi's palace in Cairo on Tuesday, prompting the Islamist leader to leave the building, two presidential sources said. REUTERS/Amr Abdallah Dalsh (EGYPT - Tags: POLITICS CIVIL UNREST)