May 10, 1869, changes the face and history of the Wild West in ways previously unimaginable. Overnight, the steady pace of oxen pulling their covered wagons across the prairie is replaced by the puffing of steam locomotives and the clattering of wheels on railroad tracks. In the desert north of the Great Salt Lake, the lines of the Central Pacific Railroad Company and the Union Pacific Railroad Company meet after a breathtaking competition. A century-long project—witnesses call it the "greatest undertaking under God"—is completed. Dr. Alexander Emmerich expertly and thrillingly describes the dramatic duel between the two railroad companies and its consequences for Native Americans and immigrants. An exciting adventure feature with original interviews, music, and sounds.