Slide show: Egypt erupts

An anti-government protester is backdropped by a fire set up by protesters near the Tahrir Square, in downtown Cairo, Egypt, Friday, Jan. 28, 2011. Egyptian activists protested for a fourth day as social networking sites called for a mass rally in the capital Cairo after Friday prayers, keeping up the momentum of the country's largest anti-government protests in years. (AP Photo/Lefteris Pitarakis) (AP)