President Mubarak's refusal to step down on Thursday turned the mood in Tahrir Square from hopeful anticipation to fury in a matter of minutes. Many see Mubarak's response as a direct rebuff to peaceful protest. Is violence the next (and last) resort?
Joining us is Shibley Telhami, Anwar Sadat professor for peace and development at the University of Maryland. Zachary Lockman, Professor of Middle Eastern and Islamic Studies and History at New York University analyzes events.