From the mechanization of agriculture to the mass production of consumer goods, the first three decades of the 20th century left no one in America untouched, for better or for worse, by the rush to modernize. This ABC News program anchored by Peter Jennings captures the heyday of American big business, when industrialization, easy consumer financing, and a bullish stock market readily translated into a higher standard of living for a growing middle class—until the Great Depression brought the nation to its knees. (29 minutes)