[v. 1] Presents addresses, articles, and first-person accounts relating to the September 11, 2001 terrorist attack on the World Trade Center and Pentagon, U. S. response, world reaction, and the war on terrorism. [v. 2] Discusses the events surrounding the attacks on the World Trade Center and the Pentagon on September 11, 2001, and describes the experiences of those involved and the impact of these attacks. [v. 3] Examines the political agendas, actions, and religious beliefs of individuals and groups who, throughout history, have resorted to violent actions in order to generate fear and gain their objectives. [v. 4] Discusses the formation, political agenda, actions, and religious beliefs of various groups that use violent means to achieve their ends.