Terrorism Prevention -- See Also War on Terrorism, 2001-2009 Here are entered works on the events, metaphorically referred to as a "war," consisting of military operations, diplomatic activities, and other counterterrorist measures undertaken by the United States during the period from September 11, 2001 to the end of the administration of George W. Bush. Works on government antiterrorist measures and activities during earlier or later periods are entered under Terrorism--Prevention.
Terrorism Religious aspects -- See Also Religious militants Here are entered works on persons who use violence, aggression or terrorist acts to further their religious ideology.
Terrorism United States -- See Also September 11 Terrorist Attacks, 2001 Here are entered works on the attacks by terrorists on the World Trade Center in New York City and the Pentagon outside Washington, D.C., using three hijacked commercial jetliners, and on the crash of a fourth hijacked jetliner in a rural area of Pennsylvania on September 11, 2001.