In April 1861, the American Civil War began, reuniting abolitionists who had grown apart in recent years.
A man who symbolized African American equality fought a proponent of Hitler's Aryan racial theories on the eve of World War II.
The acquittal of the murderers of Chicago teen Emmett Till mobilized the civil rights movement.
American comandante William Morgan went to Cuba to help Fidel Castro return the country to a democracy. Instead, four years later, he was executed.
An African American civil rights leader, Ida B. Wells was born into slavery before becoming a journalist in Memphis.
President Richard Nixon and Henry Kissinger initiated a secret diplomatic breakthrough with Mao Tse-tung that shocked and changed the world.
A look at the poor Scottish emigrant boy who built a fortune in telegraphy, railroads and steel, and then began systematically to give it all away.
Today one of the most-recognized figures in American literary history, poet Walt Whitman was denounced by critics in his own time.
The remarkable and tragic life of the third Kennedy son, Robert F. Kennedy.