Tensions escalate in Egypt
Egyptian protesters chant anti-Muslim Brotherhood slogans during a rally in front of the presidential palace, in Cairo, Egypt, Tuesday, Dec. 4, 2012. Egyptian riot police beefed up security around the presidential palace Tuesday ahead of a massive rally planned by activists protesting the Islamist leader's assumption of nearly unrestricted powers and a draft constitution hurriedly adopted by his allies. (AP Photo/Nasser Nasser)