简介：From PBS and Frontline: Last year Edward Snowden downloaded tens of thousands of top-secre...
简介
From PBS and Frontline: Last year Edward Snowden downloaded tens of thousands of top-secret documents from a highly secure government computer network. The revelations that followed touched off a fierce debate over the massive surveillance operations conducted by the National Security Agency. Now FRONTLINE investigates the secret history of the unprecedented surveillance progra...
