Terrorism in the 21st century: causes and effects

Looks at the terrorist attack of the Pentagon on September 11, 2001.

Looks at the terrorist hijacking of United Airlines Flight 93 on Sept. 11, 2001, and the heroism of passengers who prevented the hijacking's ultimate success by crashing the plane into a field in Pennsylvania.

Examines the history of mass shootings and major mass shootings in the United States. Discusses the psychology of the shooters themselves, issues pertaining to mass shootings, and how they can be prevented both now and in the future. Includes color photographs, a timeline, a glossary, and further resources.