A new documentary will take audiences inside Edward Snowden's world.
"Citizenfour" tells the story of the former National Security Agency contractor who blew the whistle on the U.S. government's mass surveillance programs.
Director and producer Laura Poitras premiered the movie at the New York Film Festival.
"Citizenfour" takes its title from the alias Snowden used when he first approached Poitras in early 2013 through a series of encrypted emails with a view to leaking details of the top-secret programs to the media.
SOUNDBITE: Laura Poitras, film maker, saying (English):
"This is a continuation of looking at - focusing on post 9-11 American. And it's looking at how surveillance is used as a form of control on populations. And how the war on terror is kind of coming back to the U.S."
Ben Wisner, Snowden's attorney, hopes viewers will walk away with a better understanding of his client.
SOUNDBITE: Ben Wisner, attorney, saying (English):
