New policy, nationwide, starting on the 13th (along with a couple of other things).

Nothing can be inside of shoes, still, and all shoes must go directly onto the x-ray belt, soles-down. Shoes are no longer allowed to be run through the x-ray machine inside of bins. We are to advise passengers to remove shoes from the bins, or, lacking that, to remove them ourselves and place them onto the belt.

Apparently, DCA decided to get a jump start on it.