Anti-Surveillance Activists Say They Want to "Nullify" NSA Spying

Forbid local authorities from providing services or cooperating with federal agencies engaged in spying

The National Security Agency has an Achilles heel, according to some anti-surveillance activists. The key vulnerability, according to members of the OffNow coalition of advocacy groups: The electronic spy agency's reliance on local utilities.

The activists would like to turn off the water to the NSA's $1.5 billion Utah Data Center in Bluffdale, Utah, and at other facilities around the country.

Dusting off the concept of "nullification," which historically referred to state attempts to block federal law, the coalition plans to push state laws to prohibit local authorities from cooperating with the NSA.