The Snowden documentary shows that only government transparency can stop leaks

Transparency is coming, whether the government likes it or not. The only question is whether they decide to bring it to the public before whistleblowers do it for them.

That's the underlying message of Laura Poitras' mesmerizing new documentary, Citizenfour about Edward Snowden and the National Security Agency that debuted at the New York Film Festival on Friday night.

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