Learn how warrantless government spying on Americans became illegal and about one man’s decision to reveal information on secret surveillance programs under the George W. Bush administration, in this media gallery adapted from FRONTLINE: United States of Secrets. As a lawyer working closely with the Foreign Intelligence Surveillance Court (FISA), Thomas Tamm discovered the existence of a government program that spied on American citizens without warrants. Warrantless surveillance became a felony offense after President Richard Nixon was impeached for doing just that. Tamm decided to become a government whistleblower, leaking details about these programs to The New York Times. This resource is part of the FRONTLINE collection.
Find out more at the series' website.