1/7A protester opposing Egyptian President Mohamed Morsi throws a tear gas canister, earlier thrown by riot police near Tahrir Square, Cairo, Egypt, January 25, 2013.
Protesters clashed with riot police in Tahrir Square, where thousands of demonstrators marked the second anniversary of the uprising that brought down Hosni Mubarak.
2/7Protesters opposing Egyptian President Mohamed Morsi throw stones towards riot police during clashes near Tahrir Square, Cairo, Egypt, January 25, 2013.
Protesters clashed with riot police in Tahrir Square, where thousands of demonstrators marked the second anniversary of the uprising that brought down Hosni Mubarak.
3/7A riot police officer gestures during clashes with protesters opposing Egyptian President Mohamed Morsi throwing stones at him near Tahrir Square, Cairo, Egypt, January 25, 2013.
Protesters clashed with riot police in Tahrir Square, where thousands of demonstrators marked the second anniversary of the uprising that brought down Hosni Mubarak.
4/7Photographers cower as protesters throw stones towards riot police near Tahrir Square, Cairo, Egypt, January 25, 2013.
Protesters clashed with riot police in Tahrir Square, where thousands of demonstrators marked the second anniversary of the uprising that brought down Hosni Mubarak.
5/7Protesters opposing Egyptian President Mohamed Morsi attend Friday prayers at Tahrir Square, Cairo, Egypt, January 25, 2013.
Protesters clashed with riot police in Tahrir Square, where thousands of demonstrators marked the second anniversary of the uprising that brought down Hosni Mubarak.
6/7Protesters opposing Egyptian President Mohamed Morsi shout slogans in Tahrir Square, Cairo, Egypt, January 25, 2013.
Protesters clashed with riot police in Tahrir Square, where thousands of demonstrators marked the second anniversary of the uprising that brought down Hosni Mubarak.
7/7Anti-Morsi demonstrators throw tear-gas canisters back at riot police who set fire to demontraters' tents in Tahrir Square, Cairo, Egypt, January 25, 2013.
Protesters clashed with riot police in Tahrir Square, where thousands of demonstrators marked the second anniversary of the uprising that brought down Hosni Mubarak.
