Skip to Videos All | Age of Exploration | The Colonial Era | The American Revolution | The Young Republic | National Expansion | The Civil War | HISTORY250® Specials | HISTORY250® Specials, • 2/25/26 A HISTORY250® Special - Let Freedom Ring In 1963, Martin Luther King Jr. delivers the most important speech of the Civil Rights Movement. HISTORY250® Specials, • 2/25/26 A HISTORY250® Special - Bets, Booms, and Busts The Roaring Twenties came to an abrupt end with the Crash of October, 1929.