Inside AT&T and the NSA's 'highly collaborative' partnership

An article published jointly by The New York Times and Pro-Publica reports that AT&T demonstrated an "extreme willingness to help" the NSA, according to documents from Edward Snowden. Among other revelations, the article reports that AT&T forwarded a million emails and handed over a billion cell phone records to the NSA. Pro-Publica reporter Jeff Larson joins Hari Sreenivasan to discuss.