Union MP15DCs shuffling slabs at J. Edgar Thompson Works

At the start of the summer, I went out to East Pittsburgh to catch NS leading a late Amtrak Pennsylvanian, and to see if I could find any Union Railroad action. Lo and behold, 3 MP15DCs appeared with a cut of empty slab cars, which they backed down into the Works just behind my perch. Two of the three units were still in the modified dark blue with yellow safety stripe, while the third unit was in the green and yellow scheme.