whom traveled to russia for the interview. in his book "no place to hide," greenwald discussed the moment he met snowden in hong kong. >> what did you make of him? >> the initial impression was one of extreme confusion. i was expecting to meet someone in his 60s or 70s, someone very senior in the agency, because i knew almost nothing about him prior to our arrival in hong kong. >> it was a really intimidating moment. you know, it was the most real point of no return, because the minute you start talking to a journalist as an intelligence officer on camera, there is really no going back from that. that's where it all comes together. >> also, you had this tangible evidence. in effect, he was saying to you if i wasn't legit, where else would i have gotten this? >> right. that was certainly a good start to establishing his credibility and his authenticity was the