Egyptian riot police fire tear gas at protesters, not seen, during clashes in front of the Semiramis Intercontinental hotel, background near Tahrir Square, Cairo, Egypt,Tuesday, Jan. 29, 2013. (AP Photo/Khalil Hamra)

Photo by: Khalil Hamra

Egyptian riot police fire tear gas at protesters, not seen, during clashes in front of the Semiramis Intercontinental hotel, background near Tahrir Square, Cairo, Egypt,Tuesday, Jan. 29, 2013. (AP Photo/Khalil Hamra)