Real people? Were they even real people? The end credits had a proclamation that all the people appearing in the film were fictional. I suspect that also covers those interview things. Personally I disliked them anyway. They broke the story flow and brought absolutely nothing essential into it, regardless of whether they were all fiction or actually real. But then again, considering it's a Russian film, I was expecting something like that. Russians tend to do things a little differently.

It was a decent enough movie but I doubt I'll be ever watching it a second time.