Al-Qaeda

al-Qaeda is a major terrorist organization, of an extreme Salafist ideology centered around reestablishing the Caliphate through armed jihad. Its immediate predecessor was the Services Office created to support the Afghanistan War (1978-92) by Abdullah Azzam and Osama bin Laden. It was joined by Egyptian Islamic Jihad under Ayman al-Zawahiri. They, in turn, trace their origins to modern Salafism derived from the medieval concepts of Ibn Tamiyya.

The group has been conducting terrorist operations since the mid-1990s, including the 9-11 attack, when its leadership was in Afghanistan. It has become a distributed worldwide organization, but the leadership is believed to be in the border areas of Pakistan and Afghanistan.