"Nearly a year after he first met Edward Snowden, Pulitzer Prize-winning journalist Glenn Greenwald continues to unveil new secrets about the National Security Agency and the surveillance state. His new book, "No Place to Hide: Edward Snowden, the NSA, and the U.S. Surveillance State," is being published today. It includes dozens of previously secret NSA documents, including new details on how the NSA routinely intercepts routers, servers and other computer hardware devices being exported from the United States. According to leaked documents published in the book, the NSA then implants backdoor surveillance tools, repackages the devices with a factory seal and sends them on. This gives the NSA access to entire networks and all their users. The book includes one previously secret NSA file that shows a photo of an agent opening a box marked CISCO. Below it reads a caption: "Intercepted packages are opened carefully." Another memo observes that some signals intelligence tradecraft is "very hands-on (literally!)." Greenwald joins us in the studio to talk about this and other new revelations about the NSA, including its global economic espionage, spying at the United Nations, and attempting to monitor in-flight Internet users and phone calls. For his reporting on the NSA, Greenwald recently won a George Polk Award and was part of the team from The Guardian that just won the Pulitzer Prize in Public Service."