In Rochester, New York, the last stop on the Underground Railroad, Frederick Douglass published abolitionist newspaper "The North Star," naming it after the icon followed by so many escaping slaves on their quest to freedom.
A brilliant scientist, Oppenheimer was tasked with the development of the atomic bomb during World War II.
A civil rights leader in Harlem before entering politics, Powell was one of the most charismatic black leaders of the 20th century.
Today one of the most-recognized figures in American literary history, poet Walt Whitman was denounced by critics in his own time.
The acquittal of the murderers of Chicago teen Emmett Till mobilized the civil rights movement.
The stories of ordinary people in the tumultuous years after the Civil War, when America struggled to rebuild the Union.
For 21 years, Chicago mayor Richard J. Daley ruled the city, building the Sears Tower and O'Hare Airport.
In August 1942 the murder of a young Mexican American man ignited a firestorm in Los Angeles, ultimately sparking brutal race riots.
The unusual life of David Vetter, who lived permanently inside a germ-free environment due to severe combined immunodeficiency.