Tahrir Square clashes

Protesters clash with riot police along a road which leads to the Interior Ministry, near Tahrir Square, in Cairo, Wednesday, Nov. 23, 2011. Several thousand Egyptians rallied in Tahrir Square demanding an end to military rule, despite a promise by the country's interim leader to transfer power to an elected president by mid-2012.

Egyptian protester run during clashes with riot police — Getty Images/Mahmud Hams

Egyptian protesters run during clashes with riot police along a road which leads to the Interior Ministry, near Tahrir Square, in Cairo on Wednesday, Nov. 23, 2011.

Egyptian riot police stand behind their shields as they clash with protesters along a road which leads to the Interior Ministry, near Tahrir Square, in Cairo, Wednesday, Nov. 23, 2011.

Protesters demonstrate during clashes with Egyptian riot police, not pictured, near Tahrir Square in Cairo, Egypt, Tuesday, Nov. 22, 2011.

Egyptians carry a body of a protester — AP Photo/Khalil Hamra

Egyptians carry the body of a protester, killed in recent clashes with the Egyptian riot police, during his funeral at Tahrir square in Cairo, Egypt, Tuesday, Nov. 22, 2011.

A veiled woman takes pictures with her cell phone during clashes with Egyptian riot police, not pictured, near Tahrir Square in Cairo, Egypt, Tuesday, Nov. 22, 2011.

protester overwhelmed by tear gas is aided by two men — AP Photo/Tara Todras-Whitehill

A protester overwhelmed by tear gas, center, is aided by two men on a motorcycle during clashes with Egyptian riot police, not pictured, near Tahrir Square in Cairo, Egypt, Tuesday, Nov. 22, 2011.

A protester wearing swimming goggles crouches as tear gas is fired by Egyptian riot police, not pictured, during clashes near Tahrir square in Cairo, Egypt, Tuesday, Nov. 22, 2011.

Egyptian protesters call on fellow demonstrators to stop throwing stones as tens of thousands of Egyptians pack Cairo's landmark Tahrir Square on the fourth day of clashes with security forces on Tuesday, Nov. 22, 2011, to demand an end to military rule, heightening tension after days of deadly clashes that threaten to derail next week's legislative polls.

Egyptian riot police stand guard during clashes near Tahrir Square in Cairo, Egypt, Tuesday, Nov. 22, 2011.

An Egyptian soldier tries to keep thousands of protesters away from riot policemen during a demonstration in Cairo's landmark Tahrir Square on the fourth day of clashes with security forces on Tuesday, Nov. 22, 2011.

A protester overwhelmed by tear gas is aided by other men during clashes with Egyptian riot police, not pictured, near Tahrir Square in Cairo, Egypt, Tuesday, Nov. 22, 2011.

Egyptian boy holds a mask and bottle of water as he runs for cover — AP Photo/Khalil Hamra

An Egyptian boy holds a mask and a bottle of water as he runs for cover from tear gas during clashes between protesters and Egyptian riot police near Tahrir square in Cairo, Egypt, Tuesday, Nov. 22, 2011.

Thousands of Egyptian protesters demonstrate outside the northern military command headquarters in the Mediterranean port of Alexandria on Tuesday, Nov. 22, 2011, demanding an end to military rule, heightening tension after days of deadly clashes that threaten to derail next week's legislative polls.

Police fire tear gas during clashes with protesters — AP Photo/Khalil Hamra

An Egyptian riot police officer fires tear gas during clashes with protesters near Tahrir square in Cairo, Egypt, Tuesday, Nov. 22, 2011.

Protesters run for cover during clashes with the Egyptian riot police near Tahrir square in Cairo, Egypt, Tuesday, Nov. 22, 2011.

Egyptian protester throw stones on the third day of clashes with security forces at Tahrir Square in Cairo on Tuesday, Nov. 21, 2011.

Protesters carry a wounded man during clashes with the Egyptian riot police near Tahrir square in Cairo, Egypt, Tuesday, Nov. 22, 2011.

An injured Egyptian protester is helped away during clashes with security forces on the third day at Tahrir Square in Cairo on Tuesday, Nov. 21, 2011.

An Egyptian protester forwards a tear gas canister on the third day of clashes with security forces at Tahrir Square in Cairo on Tuesday, Nov. 21, 2011.

Egyptian protesters clash with security forces on the third day at Tahrir Square in Cairo on Tuesday, Nov. 21, 2011.

Egyptians carry a body of a protester was killed in clashes with police — AP Photo/Khalil Hamra

Egyptians carry a body of a protester was killed in clashes with the Egyptian riot police during his funeral at Tahrir square in Cairo, Egypt, Tuesday, Nov. 22, 2011.

A Protester throws a tear gas canister away during clashes with the Egyptian riot police near Tahrir square in Cairo, Egypt, Tuesday, Nov. 22, 2011.

A protester throws stones during clashes with the Egyptian riot police near Tahrir Square in Cairo, Egypt, Tuesday, Nov. 22, 2011.

Protesters chant slogans during clashes with Egyptian riot police near Tahrir Square in Cairo, Egypt, Tuesday, Nov. 22, 2011.

A Protester runs to throw a tear gas canister away during clashes with the Egyptian riot police near Tahrir square in Cairo, Egypt, Tuesday, Nov. 22, 2011.

Protesters throw stones during clashes with police — AP Photo/Khalil Hamra

Protesters throw stones during clashes with the Egyptian riot police near Tahrir square in Cairo, Egypt, Tuesday, Nov. 22, 2011.

Protesters gather in Tahrir Square in Cairo, Egypt, Monday, Nov. 21, 2011.

Egyptian protesters and riot police face off in Alexandria, Egypt, Monday, Nov. 21, 2011. Protesters marched in cities across the nation, including thousands of students in the coastal city of Alexandria, calling for those responsible for the violence in Cairo to be punished.

Egyptian protesters wave their national flags as they chant slogans against the ruling military council at Tahrir Square, the focal point of Egyptian uprising in Cairo, Egypt, Monday, Nov. 21, 2011.

Protesters run for cover from tear gas fired by Egyptian riot police, not seen, during clashes near Tahrir Square in Cairo, Egypt, Monday, Nov. 21, 2011.

Protesters move away from tear gas fired by Egyptian riot police, not seen, during clashes near Tahrir Square in Cairo, Egypt, Monday, Nov. 21, 2011.

A wounded Egyptian protester reacts as a medic treats him in Cairo, Egypt, Monday, Nov. 21, 2011.

Egyptian protesters gather around Tahrir square during the clashes with the Egyptian riot police, unseen, in Tahrir square, Cairo, Egypt, Monday, Nov. 21, 2011.

Two Egyptian protesters throw rocks toward Egyptian riot police in Cairo, Egypt, Monday, Nov. 21, 2011.

Egyptian protesters surround a fire set in a building near Tahrir Square in Cairo, Egypt, Monday, Nov. 21, 2011. Local people at the scene blame the fire on police firing tear gas in the area. Egyptian riot police clashed Monday with some thousands of protesters demanding that the ruling military quickly announce a date to hand over power to an elected government.

An Egyptian protester covers his face from tear gas during the clashes with Egyptian riot police, unseen, in Cairo, Egypt, Monday, Nov. 21, 2011.

Egyptian protesters gather around Tahrir Square during the clashes with the Egyptian riot police, unseen, in Tahrir square, Cairo, Egypt, Monday, Nov. 21, 2011.

A protester overcome with tear gas inhalation sits on the curb — AP Photo/Tara Todras-Whitehill

A protester overcome with tear gas sits on the curb during clashes with the Egyptian riot police near the Interior Ministry in downtown Cairo, Sunday, Nov. 20, 2011.

Egyptian medics help a wounded protester during the clashes with the Egyptian riot police, unseen, in Tahrir square, Cairo, Egypt, Monday, Nov. 21, 2011.

Egyptian protesters run for cover during clashes with riot police at Cairo's Tahrir Square on Monday, Nov. 21, 2011.

protesters accompany a man overcome with tear gas inhalation — AP Photo/Mohammed Abu Zaid

Two Egyptian protesters accompany a man, center, overcome with tear gas during the clashes with Egyptian riot police, unseen, in Tahrir square, Cairo, Egypt, Monday, Nov. 21, 2011.

An Egyptian protester cover his face from tear gas during clashes with riot police at Cairo's landmark Tahrir Square on Monday, Nov. 21, 2011.

An Egyptian protester holds canisters during the clashes with the Egyptian riot police, unseen, in Tahrir square, Cairo, Egypt, Monday, Nov. 21, 2011.

An Egyptian protester shows the V-sign for victory during clashes with riot police at Cairo's landmark Tahrir Square on Monday, Nov. 21, 2011.

An Egyptian Protester walks past men who spent the night in Tahrir Square in Cairo, Egypt, Monday, Nov. 21, 2011.

Egyptian protesters douse fire at Cairo's Tahrir Square during clashes with security forces on Monday, Nov. 21, 2011.

An Egyptian riot policeman takes position during clashes with protesters at Cairo's Tahrir Square on Nov. 20, 2011.

A general view shows Cairo's landmark Tahrir Square as Egyptian riot policeman try to disperse protesters on Nov. 20, 2011.

A protester throws a gas canister towards Egyptian riot police, not seen, near the Interior Ministry during clashes in downtown Cairo, Egypt, Sunday, Nov. 20, 2011. Firing tear gas and rubber bullets, Egyptian riot police on Sunday clashed for a second day with thousands of rock-throwing protesters demanding that the ruling military quickly announce a date to hand over power to an elected government.

Egyptian riot police throw stones during clashes with protesters near the interior ministry in downtown Cairo, Egypt, Sunday, Nov. 20, 2011.

A protester throws a tear gas grenade back at Egyptian riot police near the interior ministry in downtown Cairo, Egypt, Sunday, Nov. 20, 2011.

Protesters run from tear gas during clashes with Egyptian riot police near the interior ministry in downtown Cairo, Egypt, Sunday, Nov. 20, 2011.

Egyptian riot police stand guard during clashes with protesters near the interior ministry in downtown Cairo, Egypt, Sunday, Nov. 20, 2011.

Protesters take a cover during clashes with Egyptian riot police near the interior ministry in downtown Cairo, Egypt, Sunday, Nov. 20, 2011.

A protester throws stones at Egyptian riot police during clashes near the interior ministry in downtown Cairo, Egypt, Sunday, Nov. 20, 2011.

Protesters throw stones at Egyptian riot police during clashes near the interior ministry in downtown Cairo, Egypt, Sunday, Nov. 20, 2011.

A protester overcome with tear gas inhalation is helped inside a cafe during clashes with the Egyptian riot police, not seen, near the interior ministry in downtown Cairo, Egypt, Sunday, Nov. 20, 2011.