"I met Glenn [ Greenwald] briefly in 2009. We were both guests on Real Time With Bill Maher. I was the show's guest and he was on the panel. But this was before the Snowden stuff happened. I didn't have the opportunity to meet him in preparation for the movie, unfortunately, for various reasons. But I was able to dive into the main articles he's written, and interviews with him, and just the function that the character serves in the movie, that was enough for me."