In what we’re pretty sure is the biggest single rollout of WMATA’s random bag sweeping policy, we’re hearing that the transit agency is currently performing bag checks at three — count ’em three! — stations. Security personnel at Archives-Navy Memorial-Penn Quarter, Franconia-Springfield and Huntington are randomly checking parcels during the evening rush hour, so if you’re heading south on the Green, Yellow or Blue Line, take note and be prepared to be pulled aside if your number comes up.