Fireworks are seen over hundreds of thousands of Egyptians gathering in Cairo's Tahrir Square during a demonstration Sunday against Egypt's Islamist President Mohammed Morsi. Supporters of Mr. Morsi also rallied, raising fears of violence.

Fireworks are seen over hundreds of thousands of Egyptians gathering in Cairo's Tahrir Square during a demonstration Sunday against Egypt's Islamist President Mohammed Morsi. Supporters of Mr. Morsi also rallied, raising fears of violence.