This fall, the National Security Agency will begin operations at its 2 billion dollar Utah Data Center in Bluffdale. NSA expert James Bamford calls it the most covert and potentially intrusive intelligence agency ever. He says the facility in Utah will essentially serve as the NSA's "cloud," and could house "yottabytes" of intercepted data including private emails, cell phone calls and other personal data trails. Monday, Bamford joins us to talk about the history of the NSA and what its expansion means for the nation.

James Bamford is a journalist and the author of three books on the NSA: The Shadow Factory [Amazon/Indiebound], Body of Secrets [Amazon/Indiebound] and The Puzzle Palace [Amazon/Indiebound]. His article on the Utah Data Center appeared in Wired.