Mick Hartley

Jack Delano, January 1943. "Conductor handling engineer copy of train orders before a Chicago and North Western freight pulls out of Chicago for Clinton, Iowa. Since the track between those points is under automatic train control, the engineer hands the conductor the key to the automatic train control lock of the engine. The conductor will keep the key in the caboose until the train arrives at its destination."

[Photo: Shorpy/Jack Delano for the Office of War Information]