ROHAN GUNARATNA is professor and head of the International Centre for Political Violence and Terrorism Research at the S. Rajaratnam School of International Studies, Nanyang Technological University, Singapore. He was a senior fellow at the Fletcher School of Law and Diplomacy and at the Combating Terrorism Center at West Point. Gunaratna is the author or editor of fourteen books, including "Inside Al Qaeda: Global Network of Terror "(2002).