Essential events

Examines the tragedy at Columbine High School in 1999 when two senior students went on a killing spree, describes the background and mental state of the killers, and discusses possible signs of their murderous intentions exhibited prior to the rampage. Includes photos, a timeline, basic facts about the event, a glossary, and an index.

Presents an overview of the Cold War between the United States and the Soviet Union that followed World War II. Describes the political and military escalation that resulted in the Red Scare, the Korean and Vietnam wars, and numerous diplomatic efforts until the Soviet Union was dissolved in 1991. Includes a timeline and a glossary.

Explores the United States involvement in the Vietnam War and how it sculpted society, science, and politics. Includes photographs and a time-line.

Outlines the events that caused the United States to enter World War I and details the progression of what some called "The War to End All Wars." Includes black-and-white photographs, a timeline, a glossary, and further reading sources.

Examines the events of the 2011 Japan earthquake, tsunami, and nuclear disasters, along with the world response to these crises. Includes a timeline and glossary of terms.

Provides information about the capture and killing of the founder of al-Qaeda, Osama Bin Laden, examining the events that led to this mission and discussing how it impacted American society.