There's nothing like hearing an engine whistle in the still night. Union Pacific is directed by Cecil B. DeMille (aided by others due to illness) and based upon the novel Trouble Shooter, written by Ernest Haycox. It stars Barbara Stanwyck, Joel McCrea, Robert Preston, Brian Donlevy, Akim Tamiroff and Lynne Overman. Story is a fictionalised account of the building of the railroad across the American West, encompassing the trials, tribulations and rivalries that formed as history was being made. "The legend of Union Pacific is the drama of a nation, young, tough, prodigal and invincible,…