Yes, that was sarcasm. Except for those folks who really believe that someone could do any significant damage to the Brooklyn Bridge with an acetylene torch, without being REALLY obvious for a REALLY long time.
Most big fish are overseas, I hope. If I recall, the way they blew that big fish up in Yemen with a hellfire missile was because he called here and got tracked.
I hope you don't think every arrest of a terrorist here, especially a non citizen, is being reported. In fact, I'm guessing a few foriegn nationals have just vanished. As it should be.