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Britain enters World War I
Britain enters World War I. -
Japan bombs Pearl Harbor
Japan bombs Pearl Harbor; United States enters World War II. -
U.S. drops the Atomic Bomb on Hiroshima
The United States drops atomic bombs on Hiroshima and Nagasaki. World War II ends as Japan surrenders. -
President John F. Kennedy is assassinated
President John F. Kennedy is assassinated. -
Attack on World Trade Center
Hijaked planes crash into the World Trade Center in New York, the Pentegon in Washington, D.C., and in a field in rural Pennsylvania. Thousands of lives are lost.