Using semi-structured interviews, 35 incarcerated Middle Eastern terrorists have been interviewed – 21 Islamic terrorists representing Hamas (and its armed wing Izz a-Din al Qassan), Islamic Jihad, and Hizballah, and 14 secular terrorists from Fatah and its military wing, PFLP and DFLP. The purpose of the research was to understand their psychology and decision-making in general, and with special reference to their propensity towards weapons of mass destruction.