continue their assault on encroaching big business by targeting the union pacific railroad and its valuable cargo. the railroad giant is a high-profile target and key player in western expansion. >> the engineer sees these swinging lanterns. and he just assumes these guys are working for the railroad and that the -- were washed out ahead. so he's got to stop the train. otherwise, they might derail. >> hey, that was close. you got a nice train, mr. conductor. you mind if i come over, check it out? >> one of the great aspects of cassidy was his avoidance of -- of violence. and when he robbed the train, he would separate the engine and the coal car and the express car from the people... >> move it! >> and that way they could rob the express car at leisure. >> loaded with cash, gold and other valuables