As one of the first journalists privy to NSA whistleblower Edward Snowden’s archives, Glenn Greenwald has a unique window into the inner workings of the NSA and Britain's GCHQ. A vocal advocate for civil liberties in the face of growing post-9/11 authoritarianism, Greenwald was a natural outlet for Snowden, who’d admired his combative writing style in Salon and elsewhere.

Since his original Guardian exposés of Snowden’s revelations, Pulitzer winner Greenwald continues to stoke public debate on surveillance and privacy both in the media, on The Intercept, and with his new book No Place to Hide -- and suggests that the there are more shocking revelations to come.