Egyptian army tanks deploy outside the presidential palace during a protest against President Mohammed Morsi in Cairo on Tuesday, Dec. 18, 2012. (AP Photo/Hassan Ammar)
Egyptian army tanks deploy outside the presidential palace during a protest against President Mohammed Morsi in Cairo on Tuesday, Dec. 18, 2012. (AP Photo/Hassan Ammar)
Egyptian army tanks (left) deploy as protesters gather outside the presidential palace during a demonstration against President Mohammed Morsi in Cairo on Tuesday, Dec. 11, 2012. Thousands of opponents and supporters of Egypt's Islamist president staged rival rallies in the nation's capital Tuesday, four days ahead a nationwide referendum on a contentious draft constitution. (AP Photo/Hassan Ammar)
Egyptian army tanks (left) deploy as protesters gather outside the presidential palace during a demonstration against President Mohammed Morsi in Cairo on Tuesday, Dec. 11, 2012. Thousands of opponents and supporters of Egypt's Islamist president staged rival rallies in the nation's capital Tuesday, four days ahead a nationwide referendum on a contentious draft constitution. (AP Photo/Hassan Ammar)
Egyptian army soldiers stand guard as protesters stand on top of cement blocks near the presidential palace in Cairo on Dec. 9, 2012. (Associated Press)
Egyptian army soldiers stand guard Dec. 9, 2012, near the presidential palace in Cairo. Egypt's liberal opposition called for more protests, seeking to keep up the momentum of its street campaign after the president made a partial concession overnight but refused its main demand he rescind a draft constitution going to a referendum on Dec. 15. (Associated Press)
Egyptian army soldiers stand guard during a demonstration in front of the presidential palace in Cairo on Dec. 7, 2012. (Associated Press)
Egyptian army soldiers stand guard as protesters stand on top of cement blocks near the presidential palace in Cairo, Egypt, Sunday, Dec. 9, 2012. (AP Photo/Hassan Ammar)
Egyptian army soldiers stand guard near the presidential palace in Cairo, Egypt, Sunday, Dec. 9, 2012. Egypt's liberal opposition called for more protests Sunday, seeking to keep up the momentum of its street campaign after the president made a partial concession overnight but refused its main demand he rescind a draft constitution going to a referendum on Dec. 15. (AP Photo/Hassan Ammar)
