Tahrir Square filled with protesters again today. We look at the role of the Internet in the ongoing challenge to Egypt's President Hosni Mubarak. Also, NASA has completed its study of Toyotas recalled for sudden acceleration. We hear its conclusions.
Banner image: Wael Ghonim greets thousands of anti-government protesters in Tahrir Square on February 8, 2011 in Cairo, Egypt. Released by police yesterday after nearly two weeks in custody, the Google marketing executive has acknowledged that he was the anonymous administrator of the Facebook page that sparked the protests in Egypt. Photo: John Moore/Getty Images