Bill Binney in her 2011 article in The New Yorker.
Binney detailed the NSA Thin Thread program to Mayer, who describes The Program this way: http://www.newyorker.com/reporting/2011/05/23/110523fa_fact_mayer?currentPage=all
ThinThread would correlate data from financial transactions, travel records, Web searches, G.P.S. equipment, and any other “attributes” that an analyst might find useful in pinpointing “the bad guys.” By 2000, Binney, using fibre optics, had set up a computer network that could chart relationships among people in real time. It also turned the N.S.A.’s data-collection paradigm upside down. Instead of vacuuming up information around the world and then sending it all back to headquarters for analysis, ThinThread processed information as it was collected—discarding useless information on the spot and avoiding the overload problem that plagued centralized systems. Binney says, “The beauty of it is that it was open-ended, so it could keep expanding.”
Pilot tests of ThinThread proved almost too successful, according to a former intelligence expert who analyzed it. “It was nearly perfect,” the official says. “But it processed such a large amount of data that it picked up more Americans than the other systems.” Though ThinThread was intended to intercept foreign communications, it continued documenting signals when a trail crossed into the U.S. This was a big problem: federal law forbade the monitoring of domestic communications without a court warrant. And a warrant couldn’t be issued without probable cause and a known suspect. In order to comply with the law, Binney installed privacy controls and added an “anonymizing feature,” so that all American communications would be encrypted until a warrant was issued. The system would indicate when a pattern looked suspicious enough to justify a warrant.
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Binney, for his part, believes that the agency now stores copies of all e-mails transmitted in America, in case the government wants to retrieve the details later. In the past few years, the N.S.A. has built enormous electronic-storage facilities in Texas and Utah. Binney says that an N.S.A. e-mail database can be searched with “dictionary selection,” in the manner of Google. After 9/11, he says, “General Hayden reassured everyone that the N.S.A. didn’t put out dragnets, and that was true. It had no need—it was getting every fish in the sea.”
The Bush Administration simply ran Thin Thread without the anonymizing feature, as they wanted to conduct self-targeted investigations. After the NSA scandals attendant to the NYT disclosures, in 2006, it appears that feature in Binney's original design was reinstalled, and the system now operates according to computer profiling. But, the fact that everyone who makes a telephone call in America is now profiled for indicators of terrorist activities is likely the "next" startling revelation that Greenwald referred to yesterday.
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