A man suspected of being a plain-clothed policeman is escorted by anti-government protesters during clashes in Cairo, Egypt, Thursday, Feb. 3, 2011. Egypt's prime minister apologized for an attack by government supporters on protesters in a surprising show of contrition Thursday, and the government offered more concessions to try to calm the wave of demonstrations demanding the ouster of President Hosni Mubarak. (AP Photo/Emilio Morenatti)

Photo by: Emilio Morenatti

A man suspected of being a plain-clothed policeman is escorted by anti-government protesters during clashes in Cairo, Egypt, Thursday, Feb. 3, 2011. Egypt's prime minister apologized for an attack by government supporters on protesters in a surprising show of contrition Thursday, and the government offered more concessions to try to calm the wave of demonstrations demanding the ouster of President Hosni Mubarak. (AP Photo/Emilio Morenatti)