Scene of Carnage: Tahrir Square, Cairo

1 Thousands of Mubarak supporters armed with clubs, stones, rocks and knives pass through army checkpoints here.

2 Mubarak supporters, some riding camels and horses, try to push their way into the square.

3 Army troops around the museum hold their positions and generally do not engage in the conflict.

4 Antigovernment protesters break off pieces of pavement to use as projectiles. In the afternoon, both sides push back and forth in this area.

5 The battle lasted into the evening. Antigovernment protesters, who outnumbered the Mubarak supporters, built barricades to keep out their opponents.

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