Between 1890 and 1920, 12 million people emigrated from Europe arriving in New York Harbor and Ellis Island. It was one of the largest single human migrations in history.
Before World War II, young Chinese Americans defied cultural tradition in San Francisco's Chinatown, previously closed to outsiders.
From a small-town Texas murder emerged a landmark civil rights case that successfully challenged Jim Crow-style discrimination against Mexican Americans.
Their intense faith and strict adherence to 300-year-old traditions have by turn captivated and repelled, awed and irritated, inspired and confused America.
The story of a farm boy who rose from obscurity to become the most influential American innovator of the 20th century.
Robert Noyce's invention of the microchip launched the world into the Information Age.
John Scopes' free speech trial pitted science against religion after the teacher presented Charles Darwin's theory of evolution in a Tennessee school.
The Pennsylvania Railroad Company accomplished an enormous engineering feat, but destroyed a great architectural monument.
In 1978 over 900 people led by Rev. Jim Jones died in the largest mass murder-suicide in history, at Jonestown, Guyana.