The National Security Agency’s collection of phone records has had “no discernible impact on preventing acts of terrorism.” That's according to a study released Monday by the New America Foundation, which analyzed 225 terrorism cases in the U.S. since the 9/11 attacks. The study backs up the findings last month by the White House-appointed review group, which also said the NSA program was “not essential.” Instead, the New America Foundation study says that in most cases, traditional law enforcement and investigative methods were the most effective.
