Inside Pennsylvania Hall in 1838, an abolitionist meeting was disrupted when members of an anti-abolitionist mob threw rocks through the windows. The following night, the protestors set fire to the building -- completely destroying Philadelphia's monument to free speech.
In 1936 Angie Debo uncovered the U.S. government's theft of Native Americans' oil rich lands in Indian Territories of Oklahoma.
A man who symbolized African American equality fought a proponent of Hitler's Aryan racial theories on the eve of World War II.
John Wesley Powell's epic journey into the unknown Grand Canyon was filled with adventure as his team mapped the Colorado River for the first time.
The last surviving member of a California Indian tribe became a sensation in 1911.
The six-part story of a frontiersman farmer and a wealthy Confederate slave-owner's daughter.
In 1936, GM and Ford could not stop one of the worst battles of the American labor movement.
A civil rights leader in Harlem before entering politics, Powell was one of the most charismatic black leaders of the 20th century.
Accounting for America's most famous inventor and his role in America's future.