Art least four people have been killed in the violence.
The Egyptian demonstrators were inspired by similar protests in Tunisia, which forced that country's president from office.
And, as Jeff Glor reported on "The Early Shopw," amateur video from one of the protests evoked memories of the famous actions of a single protester amid the protests in China's Tiananmaen Square in 1989. He stook singlehandedly - and unsuccessfully - against government tanks.
In Eqypt - it was one man against a water cannon: