John Ashcroft
Ashcroft was the attorney general of the United States from 2001 to 2005; both the Patriot Act and President Bush's warrantless domestic surveillance program were implemented during his tenure.

James Baker
Baker heads the Justice Department's Office of Intelligence Policy and Review (OIPR), which is responsible for preparing and filing all applications for domestic surveillance under the Foreign Intelligence Surveillance Act (FISA).

Mark Klein
Klein worked for more than 20 years as a technician at AT&T. Here he tells the story of how he inadvertently discovered that the whole flow of Internet traffic in several AT&T operations centers was being regularly diverted to the National Security Agency (NSA).

Suzanne Spaulding
Spaulding worked for Sen. Arlen Specter (R-Pa.) and Rep. Jane Harman (D-Calif.) as a counsel for the Senate and House Intelligence Committees. She also served as assistant general counsel at the CIA (1989-1995), including three years as legal adviser for the Non-Proliferation Center (NPC).

Peter Swire
Swire served as the chief counselor for privacy in the Clinton administration from 1999 to 2001. He is currently a law professor at Ohio State University.

Michael Woods
Woods was an attorney in the FBI's national security division from 1997 to 2002.

John Yoo
Yoo was the deputy assistant attorney general in the Justice Department's Office of Legal Counsel from 2001 to 2003. During that time he helped draft the Patriot Act; he also tells FRONTLINE "the press has reported and I haven't denied" working on the legal justifications for the domestic surveillance program.