In 2013, while working as a contractor at the National Security Agency, Edward Snowden leaked an extensive collection of top secret documents, an act of defiance that, today, still reverberates throughout US intelligence and international relations. Moscow's Sheremetyevo Airport Edward Snowden in his Hong Kong hotel room Glen Greenwald and Ewan Mckaskill, in Hong Kong Academy Award onstage presentation to Laura Poitras, Glenn Greenwald and Lindsay Mills, second from right Keith Alexander 2014 retirement party, with Chuck Hagel and James Clapper