Egypt On The Brink: From Nasser to Mubarak

Yesterday, President Hosni Mubarak announced he would continue to stay in power through September, despite massive demonstrations around the country demanding that he step down immediately. Tarek Osman, author of Egypt On The Brink: From Nasser to Mubarak, talks about what's happened in Egypt since President Nasser came to power in 1954 and what's been happening on the streets this week.