The crowd gathers in Tahrir, or Liberation, Square in Cairo, Egypt, Tuesday, Feb. 1, 2011. Tens of thousands of people flooded into the heart of Cairo Tuesday, filling the city’s main square as a call for a million protesters was answered by the largest demonstration in a week of unceasing demands for President Hosni Mubarak to leave after nearly 30 years in power. (AP Photo/Khalil Hamra)

The crowd gathers in Tahrir, or Liberation, Square in Cairo, Egypt, Tuesday, Feb. 1, 2011. Tens of thousands of people flooded into the heart of Cairo Tuesday, filling the city’s main square as a call for a million protesters was answered by the largest demonstration in a week of unceasing demands for President Hosni Mubarak to leave after nearly 30 years in power. (AP Photo/Khalil Hamra)