In the hands of those unafraid to die using them, nuclear, biological and chemical weapons become an unprecedented threat -- a new kind of terrorism: global in scope, fueled by religious zeal, fed by recruits and connected by accessible technology. The people, the causes and the conditions are examined. Can terrorism be defeated or denied? How will the world's children decide which path to take? Small groups of people can inflict enormous damage. Essam al-Ridi, a former comrade of Osama bin Laden, disillusioned by al Qaeda's murderous methods, tells an inside story. A Great Britain Islamic couple condemn the attacks of September 11th, yet teach the concept of jihad (Holy War). In Gaza, 17-year-old Ehab Yusef imagines a productive life, but ponders a "martyr's" death. World experts trace the roots of terrorism, from CIA Director George Tenet to "Inside al Qaeda" author Rohan Gunaratna.