Modern Marvels: Season 23, Episode 6

23 - 6: Freight Trains Plus

Get ready to ride the rails as we take a trip along the greatest freight transportation system in the world! From the early iron horses to today's sleek steel stallions, Modern Marvels climbs aboard the complex rail network that snakes throughs valleys, over rivers and across prairies to get America's goods from the factory to your front door.