Al-Qaeda is an Islamic extremist group founded in the late 1980s by Osama bin Laden and others. It aims to establish a global Islamic caliphate and is known for its militant activities, including terrorist attacks against various targets, particularly in the West. The group gained international notoriety after the September 11, 2001 attacks in the United States. The organization operates through a network of affiliated groups and cells around the world. It promotes a radical interpretation of Islam and often recruits members by exploiting political grievances and social issues. Al-Qaeda's activities have led to significant global security concerns and counter-terrorism efforts.