Protesters chant slogans, as Egyptian army soldiers stand gurad in front of 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)

Associated Press
Protesters chant slogans, as Egyptian army soldiers stand gurad in front of 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)
Protesters chant slogans, as Egyptian army soldiers stand gurad in front of 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)
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