Frontline: United States of Secrets

Penetrate the veil of the National Security Agency to learn why─and how─the U.S. government went about collecting the communications of people all over the world in the post-9/11 era, with this compelling two-part documentary from "Frontline." The program retraces the unprecedented steps the NSA took to monitor foreigners and American citizens, recounts the Edward Snowden controversy, and reveals the once-secret cooperation between the government and Silicon Valley tech companies. 180 min. Widescreen (Enhanced); Soundtrack: English Dolby Digital stereo.