Publisher: Al Jazeera Publication Date: February 1, 2011 Copyright: 2011 Publisher Website: http://english.aljazeera.net/ Language: English Hundreds of thousands of Egyptians have streamed into central Cairo on Tuesday, taking over Tahrir Square in an unprecedented protest against President Hosni Mubarak. Packed shoulder to shoulder, they held aloft posters denouncing the president, and chanted slogans "Go Mubarak Go" and "Leave! Leave! Leave!" Similar demonstrations calling on Mubarak to step down were also witnessed across other cities, including Sinai, Alexandria, Suez, Mansoura, Damnhour, Arish, Tanta and El-Mahalla el-Kubra.