From ACLU:
A few days ago, we highlighted the drastic privacy implications of new guidelines issued to govern data-mining by the National Counterterrorism Center (“NCTC”). Yesterday, we testified to Congress about the problems with the guidelines, and we filed three Freedom of Information Act (“FOIA”) requests to learn more about how the guidelines will affect the privacy of millions of Americans.
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Read More… from Step one in data-mining America: Build a big database