The operators of the Washington Metro are calling for increased vigilance in the wake of the arrest of Farooque Ahmed, who was caught in a sting operation in which he thought he was plotting with al-Qaeda terrorists.

This reminded me of a “letter to the editor” in the Washington Post a few weeks ago from a vigilant woman who told the police about a suspicious package — and then watched as the police and the Metro did nothing.

Also, the authorities aren’t being specific about what D.C. folks should be on the lookout for, other than anything unusual. “Hey, look at the nun over there! She’s acting funny. Call DHS!” Just remember, don’t dare report anyone in Muslim garb, or else you’ll be called a bigot.