Several years ago, we were driving through Roanoke and had arranged to meet a fellow photographer for dinner. That dinner turned into a two-day guided tour of the environs, including a highly informed visit to the Link Museum. They have a marvelous display of the cameras (and many, many lights) he used for his iconic images. Apparently he had such clout with the railway that they would adjust their schedules to allow him to get the shots he wanted under the lighting he preferred. At least once, they backed a train up for a second pass so he could get the right shot.