"Back at an open congressional hearing on March 12, Sen. Ron Wyden (D-Ore.) asked Clapper, 'Does the NSA collect any type of data at all on millions or hundreds of millions of Americans?' Clapper replied, 'No sir … not wittingly.' As we all now know, he was lying."
http://www.slate.com/articles/news_and_politics/war_stories/2013/06/fire_dni_james_clapper_he_lied_to_congress_about_nsa_surveillance.html