CNN) -- The National Security Agency program that collects data on nearly every U.S. phone call isn't legal, a privacy review board said Thursday in a newly released report.
Moreover, the five-member Privacy and Civil Liberties Oversight Board said it's been largely useless in thwarting terrorism.
"We have not identified a single instance involving a threat to the United States in which the program made a concrete difference in the outcome of a counterterrorism investigation," the board wrote in the report released Thursday.
Despite Obama's NSA changes, phone records still collected
Rogers: NSA reforms could hurt security Schiff: New NSA spy proposals not enough Rogers: Some NSA proposals 'not workable'
The board said it had identified only one instance in which the program helped authorities identify a terrorist in the last seven years. But the board said law enforcement would have found the suspect anyway, even without the NSA program.
Read more at www.cnn.com