al-Qaeda is a pan-Islamist militant organization led by Sunni Islamist jihadists who self-identify as a vanguard spearheading a global Islamist revolution to unite the Muslim world under a supra-national Islamic caliphate. Its membership is primarily composed of Arabs, with additional representation from other ethnic groups. Al-Qaeda has mounted attacks on civilian and military targets of the U.S. and its allies; such as the 1998 U.S. embassy bombings, the USS Cole bombing, and the September 11 attacks. It has been designated a terrorist organization by the United Nations and over two dozen countries around the world.