Overview: Five generations of mining families illustrate the story of Butte, Mont., once the world's largest producer of copper. / Irish actor Gabriel Byrne narrates the tale of Butte, Montana, once the world's largest producer of copper -- the "Richest Hill on Earth," the town that "plumbed and electrified America," the Pittsburgh of the West. Butte forged a community whose toughness, vitality and solidarity speak to what's missing in America today, while raising profound questions about the costs and consequences of industrialization and use of natural resources.