Fawaz A. Gerges is the Christian A. Johnson Chair in International Affairs and Middle Eastern Studies at Sarah Lawrence College and the author of Journey of the Jihadist: Inside Muslim Militancy and The Far Enemy: Why Jihad Went Global.
Jessica Stern is Lecturer in Public Policy at Harvard's John F. Kennedy School of Government and the author of Terror in the Name of God: Why Religious Militants Kill.
James Fallows is National Correspondent for the Atlantic Monthly. His most recent book is Blind Into Baghdad: America's War in Iraq.
John Mueller is professor of political science at Ohio State University and the author most recently of The Remnants of War. His next book, Overblown: How Politicians and the Terrorism Industry Inflate National Security Threats, and Why We Believe Them, will be published by Free Press in November.