Dark Territory: The Secret History of Cyber War, Author: Fred Kaplan.
By Fred Kaplan – Richard Clarke interrupted him. You’ve gone to the trouble of setting up this program, he said, and you’re looking for connections to just three organizations?
Moreover, if the metadata revealed that an American had called a suspected terrorist’s number, just 22 people in the entire NSA—20 line personnel and two supervisors—could request and examine more data about the phone number. At least one supervisor had to approve the request. And the authority to search the suspect’s records would expire after six months.
The group then asked about the program’s results: How many times had the NSA queried the database, how many times were terrorist plots disrupted as a result?
One of the officials had the numbers at hand. For all of 2012, the NSA queried the database for 288 phone numbers. As a result, it passed on 12 tips to the FBI, which had the legal authority to investigate much more deeply. How many of those tips led to the halting of a plot? The answer was zero. None of the tips had led to anything. more> http://goo.gl/A3s0yx