I have no idea what this is attached to the nose of 9491. I think it is a remote controlled unit, though, because a few minutes later, it moved under its own power into a building to the left.
NS 5301 approaches Enola Yard with a mixed lashup as an eastbound intermodal crosses Rockville Bridge in the background. Canon 10D and 70-200mm lens, 1/350 second exposure, f8.0, F.L. 200mm, ISO 1... (more)