it would, if they did it.
but if tommorrow, some dude with an OBL shirt and a backpack walked into the subway in NYC - I doubt that person would be stopped before boarding the train.
Especially if he looked Middle Eastern. Must not profile.
"but if tommorrow, some dude with an OBL shirt and a backpack walked into the subway in NYC - I doubt that person would be stopped before boarding the train."
Methinks you are wrong, if said dude were spotted by NYPD or the Transit Police. The politicians may be concerned about whom they offend, but the cops want to be able to go home to their families at night. (Of course the LEO problem is, when you halt a suicide bomber who's under suspicion, and he detonates, he's accomplished his mission, and you probably won't make it home after all.)