The claims are still exaggerated though, the water is not 'protected by clams'. The water is protected by a sophisticated system of monitoring instruments capable of detecting any known pollutants within seconds. If these fail, they have another backup set of instruments doing the same thing. And if THESE fail, then they have the clams.<br>It does look like there is a clear weakness in the system though - reliance on electronics and electricity. Obviously sensors depend on electronics, but the clam system too relies on electronics to read the clams. If power is compromised, whether through a power surge, a bomb to the generators, or an EMP attack by insurgents/libertines, the clams will be neutralized just as easily as the main sensors.