Trains on this day in the past:

[bdw9535]

I wonder if this was their way around the FRA part 223 bullet resistant glazing rule.  . I would never have thought about that but the rule says all "glazing" not a thing about windows having it.  some railroads welded the doors shut and called the pushing platforms. 
Charlie

Great Eye!
They must have been replacing the windows at that time.  Here's a shot from September 1997 with the glass in.

Bruce