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Protesters chant slogans and wave national flags in Tahrir Square in Cairo, Egypt, Tuesday, Dec. 4, 2012. Hundreds of black-clad riot police deployed around the Itihadiya palace in Cairo's district of Heliopolis. Barbed wire was also placed outside the complex, and side roads leading to it were blocked to traffic. Protesters gathered at Cairo's Tahrir square and several other points not far from the palace to march to the presidential complex. (AP Photo/Maya Alleruzzo)

Crisis in Egypt

Islamists backing a new constitution for Egypt claimed victory Dec. 16 in

the first leg of a referendum, but the opposition alleged polling

violations and called for nationwide protests ahead of next week's elections.