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The report from the office of Director of National Intelligence Dan Coats was the first measure of the effects of the 2015 USA Freedom Act, which limited the NSA to collecting phone records and contacts of people U.S. and allied intelligence agencies suspect may have ties to terrorism.
It found that the NSA collected the 151 million records even though it had warrants from the secret Foreign Intelligence Surveillance court to spy on only 42 terrorism suspects in 2016, in addition to a handful identified the previous year.
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| An illustration picture shows the logo of the U.S. National Security Agency on the display of an iPhone in Berlin, June 7, 2013. REUTERS/Pawel Kopczynski |
The NSA has been gathering a vast quantity of telephone "metadata," records of callers' and recipients' phone numbers and the times and durations of the calls - but not their content - since the September 11, 2001, attacks.
The report came as Congress faced a decision on whether to reauthorize Section 702 of the Foreign Intelligence Surveillance Act (FISA), which permits the NSA to collect foreign intelligence information on non-U.S. persons outside the United States, and is scheduled to expire at the end of this year.
Privacy advocates have argued that Section 702 permits the NSA to spy on Internet and telephone communications of Americans without warrants from the secret Foreign Intelligence Surveillance Court, and that foreign intelligence could be used for domestic law enforcement purposes in a way that evades traditional legal requirements.
The report said that on one occasion in 2016, the FBI obtained information about an American in response to a search of Section 702 data intended to produce evidence of a crime not related to foreign intelligence.
The report did not address how frequently the FBI obtained information about Americans while investigating a foreign intelligence matter, however.
On Friday, the NSA said it had stopped a form of surveillance that allowed it to collect the digital communications of Americans who mentioned a foreign intelligence target in their messages without a warrant.
