Edward Snowden is NSA Prism leak source - The Guardian
10 June 2013 Last updated at 06:37 BST
An ex-CIA employee has said he acted to "protect basic liberties for people around the world" in leaking details of US phone and internet surveillance.
Edward Snowden, 29, was revealed as the source of the leaks at his own request by the UK's Guardian newspaper.
Mr Snowden, now believed to be in Hong Kong, said he had an "obligation to help free people from oppression".
David Willis reports from Washington.
Video courtesy of The Guardian, Glenn Greenwald and Laura Poitras