A quintet of Union Pacific SD40s and SD40-2s drag a unit train of export coal across the Southern Pacific at Colton Crossing in the late 1970s, not too long before Colton Tower (visible behind SD40-2 3184) was razed a year after this train was photographed. The crew is enjoying early air conditioning on this summer day, with the front door propped open. (Colton, California – July 29, 1978)
