Form 2015 to 2019 the National Security Agency (NSA) collected Americans’ domestic phone calls and texts. The program cost US$100 million but only one investigation was able to make use of that data.
Moreover, only twice during that four-year period did the program generate unique information that the F.B.I. did not already possess, said the study, which was produced by the Privacy and Civil Liberties Oversight Board and briefed to Congress on Tuesday.
“Based on one report, F.B.I. vetted an individual, but, after vetting, determined that no further action was warranted,” the report said. “The second report provided unique information about a telephone number, previously known to U.S. authorities, which led to the opening of a foreign intelligence investigation.”