A boy is seen among men at prayers in Tahrir Square, Cairo, Egypt, Friday, Feb. 4, 2011. Protesters demanding President Hosni Mubarak's ouster packed Cairo's central square by the tens of thousands Friday, waving Egyptian flags, singing the national anthem and cheering, appearing undaunted and determined after their camp withstood two days of street battles with regime supporters trying to dislodge them. (AP Photo/Emilio Morenatti)