Caltech's man in Egypt calls for Mubarak to step down

Ahmed Zewail, a Nobel prize winner in chemistry who is a professor at Caltech, returned to Egypt this past week as a potential leader of his native country and on Sunday called on Hosni Mubarak to give up power. At a press conference in Cairo, Zewail said Mubarak stepping aside would "make history in the Middle East." Zewail has met with Egypt's new vice president as well as with protesters. Zewail, 64 and a resident of San Marino, serves as a science envoy to Islamic countries for President Barack Obama. Despite being mentioned as a potential leader of Egypt, he has said previously that he only wants to serve as a scientist.