Anti-government demonstrators remove the wire fences outside the presidential palace during clashes with Egypt's security forces and presidential guards in Cairo, Egypt, Feb. 11, 2013, on the second anniversary of the fall of former President Hosni Mubarak. (Xinhua/Amru Salahuddien)

 Anti-government demonstrators clash with Egypt's security forces and presidential guards outside the presidential palace in Cairo, Egypt, Feb. 11, 2013, on the second anniversary of the fall of former President Hosni Mubarak. (Xinhua/Amru Salahuddien)

Anti-government demonstrators remove the wire fences outside the presidential palace during clashes with Egypt's security forces and presidential guards in Cairo, Egypt, Feb. 11, 2013, on the second anniversary of the fall of former President Hosni Mubarak. (Xinhua/Amru Salahuddien)