Death in Tahrir Square - What happened on 2/2/11?

This is my eyewitness account of the the night of 2nd February 2011, in Tahrir Square, Cairo.
It was one of the bloodiest nights in Cairo, since the first day of protests. Anti-government protesters clashed with pro-Mubarak thugs in, and around, the square.
At least seven protesters died during the running street battles.