“I’ve been working on the railroad.” I sang as my granddad played his harmonica. He taught me the song after telling me about how his grandfather worked on the transcontinental railroad. This connected the United States by going from Oakland, California through Sacramento, then up through Utah, and across the Great Plains to Omaha, Nebraska. There it linked with rails which already existed. The workers built tunnels through mountains and bridges over rivers and canyons to get the tracks laid. It was hard, dangerous work and it took six years to complete the lines. In 1876, an express train traveled coast to coast, from New York to San Francisco in just 83 hours and 39 minutes. Just 10 years before, the same trip would have taken months by covered wagon or even weeks by ship, going all the way around South America and up the Pacific Coast. My granddad was very proud of his grandfather.