Police enforce MARC boarding

Two police officers stood guard on the platform outside Union Station during tonight's rush hour, presumably to prevent crowding on the platform. I wonder if a specific incident caused their presence or if it's a more general effort to prevent the choas that occassionally occurs at this hour. It could also be because the 6:40pm Penn Line is delayed.

I think it would be helpful if MARC could post the length of the delay so that those of us who have the option to do so can choose to take the Camden Line instead, which departs three minutes after the closest Penn Line departure at 6:43pm.
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