Edward Snowden downloaded tens of thousands of top-secret documents from a government computer network, sparking a debate over the National Security Agency's massive surveillance operations. A new investigation explores the secret history of the surveillance program, which began after 9/11 and continues today, through interviews with intelligence insiders, officials, and whistle-blowers.
Frontline
Edward Snowden, a whistleblower, leaked classified information, exposing government surveillance and sparking a global conversation about privacy and accountability.
