Inside Story - Is Mubarak's rule threatened?

AlJazeeraEnglish | January 27, 2011 - After a day of mass protests in Egypt, the government has banned any futher demonstrations. It's also warning protesters they will be prosecuted if rallies continue.

The clamp-down comes after a wave of protests swept through Egypt leaving at least four dead. Protesters are demanding an end to president Hosni Mubarak's 30-year rule.

But how different are these demonstrations from previous ones? How worried should Mubarak be? And is it that easy to unsettle him?