By Dan Eggen, Washington Post
In 2003, Room 641A of a large telecommunications building in downtown San Francisco was filled with powerful data-mining equipment for a “special job” by the National Security Agency, according to a former AT&T technician. It was fed by fiber-optic cables that siphoned copies of e-mails and other online traffic from one of the largest Internet hubs in the United States, the former employee says in court filings.
What occurred in the room is now at the center of a pivotal legal battle in a federal appeals court over the Bush administration’s controversial spying program, including the monitoring that came to be publicly known as the Terrorist Surveillance Program.
Tomorrow, a three-judge panel will hear arguments on whether the case, which may provide the clearest indication yet of how the spying program has worked, can go forward. So far, evidence in the case suggests a massive effort by the NSA to tap into the backbone of the Internet to retrieve millions of e-mails and other communications, which the government could sift and analyze for suspicious patterns or other signs of terrorist activity, according to court records, plaintiffs’ attorneys and technology experts.