Frontline: United States of Secrets, Part 1

Frontline: United States of Secrets, Part 1

Tuesday, May 13 at 9:00 p.m.

Learn how the U.S. government came to monitor the communications of millions of Americans.

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 program that began in the wake of September 11th and continues today. Through exclusive interviews with intelligence insiders, cabinet officials and government whistle-blowers, part one reveals how the U.S. government came to monitor the communications of millions of Americans and to collect billions of records on ordinary people around the world.

In part one, a two-hour film premiering Tuesday, May 13 at the special time of 9:00 p.m., veteran "Frontline" filmmaker Michael Kirk goes inside Washington and the National Security Agency, piecing together the secret history of the unprecedented surveillance program that began in the wake of September 11 and continues today – even after the revelations of its existence by Edward Snowden.

Part two airs on Tuesday, May 20 at 10:00 p.m.