TOP: Santa Fe's passenger train the "Chief" is stopped at Summit Depot in Cajon Pass while a helper engine is cut-off from the tail-end. Two brakeman walk the top of a freight train to set retainers prior to their descent of Cajon Pass - Mar 1943 Jack Delano.BOTTOM: A brakeman is seen setting the retaining valve on a boxcar in Cajon Pass - Mar 1943 Jack Delano.