Army tanks and riot police are seen outside the presidential palace in Cairo

 
Army tanks and riot police are seen outside the presidential palace in Cairo
Army tanks and riot police are seen outside the presidential palace in Cairo December 12, 2012. Egypt's main opposition coalition is expected to attend Wednesday's unity talks called by the army to help end a political crisis and is discussing the level of representation, a member of the National Salvation Front's leadership said. REUTERS/Khaled Abdullah