"...many contemporary terrorist movements-including Afghanistan’s Taliban and al-Qai’da - have theological roots in Wahhabism, a sect that forms the “state orthodoxy” of contemporary Saudi Arabia. Wahhabism is a particularly strict interpretation of Islam that adheres to the Salafist notion that “pure” Islam must be rooted in the teachings of the “early fathers”...“Wahhabist” and “Salafist” have been used extensively to define particular types of terrorism...elements of Wahabbism could give rise to a mindset that includes extremist action - as 9/11 itself demonstrates...".