In the Roaring Twenties, the New York Stock Exchange was the catwalk of high finance, where moguls and moguls-in-the-making flaunted their fortunes. But on that fateful Tuesday, the carpet was yanked from under their feet. Panic selling swept the floor, wiping out investors' fortunes overnight. The once-mighty bull market, which had galloped upward since 1924, came crashing down. The Great Depression had begun, and the world would never be the same.