02. An anti-government protester gestures during clashes with police in Cairo January 26, 2011. Thousands of Egyptians defied a ban on protests by returning to Egypt's streets on Wednesday and calling for President Hosni Mubarak to leave office, and some scuffled with police. REUTERS/Amr Abdallah Dalsh
03. Egyptian plainclothes policemen arrest an anti-government protester during clashes in Cairo January 26, 2011. Thousands of Egyptians defied a ban on protests by returning to Egypt's streets on Wednesday and calling for President Hosni Mubarak to leave office, and some scuffled with police. REUTERS/Amr Abdallah Dalsh
04. A man shouts in front of riot police in Cairo January 26, 2011. Thousands of Egyptians defied a ban on protests by returning to Egypt's streets on Wednesday and calling for President Hosni Mubarak to leave office, and some scuffled with police. REUTERS/Goran Tomasevic
05. Riot police clash with protesters in Cairo January 26, 2011. Thousands of Egyptians defied a ban on protests by returning to Egypt's streets on Wednesday and calling for President Hosni Mubarak to leave office, and some scuffled with police. REUTERS/Goran Tomasevic
06. A riot policeman holds his face after being injured during clashes with anti-government protesters in downtown Cairo January 26, 2011. Thousands of Egyptians defied a ban on protests by returning to Egypt's streets on Wednesday and calling for President Hosni Mubarak to leave office, and some scuffled with police. REUTERS/Amr Abdallah Dalsh
07. Riot police clash with protesters in Cairo January 26, 2011. Thousands of Egyptians defied a ban on protests by returning to Egypt's streets on Wednesday and calling for President Hosni Mubarak to leave office, and some scuffled with police. REUTERS/Goran Tomasevic
08. A riot policeman walks past burning tyres placed to form a barricade during clashes with protesters in Cairo January 26, 2011. Thousands of Egyptians defied a ban on protests by returning to Egypt's streets on Wednesday and calling for President Hosni Mubarak to leave office, and some scuffled with police. REUTERS/Goran Tomasevic
09. Riot police keep watch as they hold shields during clashes with protesters in Cairo January 26, 2011. Thousands of Egyptians defied a ban on protests by returning to Egypt's streets on Wednesday and calling for President Hosni Mubarak to leave office, and some scuffled with police. REUTERS/Goran Tomasevic
10. Plainclothes police arrest a protester during clashes in Cairo January 26, 2011. Thousands of Egyptians defied a ban on protests by returning to Egypt's streets on Wednesday and calling for President Hosni Mubarak to leave office, and some scuffled with police. REUTERS/Asmaa Waguih
11. Riot police stand on a street during clashes with protesters in Cairo January 26, 2011. Thousands of Egyptians defied a ban on protests by returning to Egypt's streets on Wednesday and calling for President Hosni Mubarak to leave office, and some scuffled with police. REUTERS/Asmaa Waguih
12. Riot police clash with protesters in Cairo January 26, 2011. Thousands of Egyptians defied a ban on protests by returning to Egypt's streets on Wednesday and calling for President Hosni Mubarak to leave office, and some scuffled with police. REUTERS/Asmaa Waguih
13. Plainclothes police arrest a protester during clashes in Cairo January 26, 2011. Thousands of Egyptians defied a ban on protests by returning to Egypt's streets on Wednesday and calling for President Hosni Mubarak to leave office, and some scuffled with police. REUTERS/Asmaa Waguih