The investigation into who may responsible for the bombing at UN headquarters in Baghdad Tuesday has begun. The deadly attack also raises many difficult questions related to U.S. and UN roles in Iraq. A panel joins guest host Terence Smith to talk about the challenges of nation building in Iraq.
"New York Times" columnist and author of "Longitudes and Attitudes: Exploring the World After September 11," "From Beirut to Jerusalem," and "The Lexus and the Olive Tree: Understanding Globalization."
professor of Middle East and international affairs at Sarah Lawrence College; author of "Journey of the Jihadist: Inside Muslim Militancy"