Journey to Southeast Nevada where Union Pacific trains roll beneath the rugged and breathtaking cliffs of Rainbow Canyon. Climbing through the Meadow Valley Wash north of Las Vegas, this remote stretch of railroad main line serves as a connection between Salt Lake City and Los Angeles. This is big modern Union Pacific freight action against a backdrop that has changed very little since the rails were first spiked down over 100 years ago. This is an excerpt from "Union Pacific's Caliente Subdivision." You can own this program in its entirety on DVD and Blu-ray by visiting .