while i agree that the water supply is a major area where a terrorist could cause major damage...i would say that water/sewage treatment is just as dangerous of a target (or more as we can always treat river water to drink (boil, etc)).Imagine if the sewage treatment facilities of New York city or any other major city were made useless? Within an hour there would be sewage back ups and by the end of the day there would be the onset of dangerous bacteria.I'd be protecting our sewage plants a lot more than our water cleaning facilities.
I have signatures turned off so I'm not even sure what mine says in this space!