Not all of those terrorists that you mention, DC, were part of organized terror groups or terror operations.

I might even go so far as to say that you can't properly define someone as a terrorist if they are operating alone and not part of an organization.

We can fight (and be winning) the "War on Terror" from now until the cows come home, and we'll never be able to wipe out very many of the "lone nut(s)", like the Brooklyn Bridge killer.

As long as there are individuals - acting pretty much alone and on their own initiative - who want to engage in these types of actions, I don't see that there is much that anyone - not Clinton, not Bush, not our next president - can do to stop them, short of just getting lucky and simply stumbling upon them.