Documents from NSA whistleblower Edward Snowden show NSA was given go-ahead to snoop on innocent Britons not suspected of any wrongdoing. NSA agents were able to unmask and hold on to personal data about Britons that had been previously off-limits under the Five-Eyes intelligence-sharing alliance. The agreement didnt remove the need for a warrant before the NSA looked at the content of Britons communications, but it did authorize NSA agents in these new ways:unmasking UK contact identifiers resulting from incidental collection.”]