I think he means Gates E and F, where the Acela usually board.Do you mean the ClubAcela lounge or the ticket counter with the Acela logo on the wall (next to the regular Amtrak ticket counter)?The TSA does shows up in DC from time to time with different unrecognizable stuff to try out. Never saw the scanners in the picture but they have brought other stuff. Usually they set up in the Acela area. It could be they want to impress congress critters.Given that I am through there nearly every day, and the article in the OP has a picture of the scanners, no, they definitely haven't been used.
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