Intelligence chief adds safeguards after wrongful intercepts

WASHINGTON (CNN) -- U.S. intelligence officials said Thursday that they have added safeguards to prevent the government from unlawfully spying on U.S. citizens after a routine check of the system "detected issues that raised concerns."

In his statement, Blair said the NSA goes to great lengths to ensure the privacy and civil liberties of U.S. citizens but has made occasional mistakes. Intelligence chief cites wrongful intercepts

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