This is a must-see and one of the best documentaries - and films - of this year.

While it doesn't offer any answers, it both thrills and makes you think.

It's the kind of movie you'll want to see a second time with someone who hasn't seen it yet, to remember what it was like to watch it for the first time.

There is, somehow, an interesting story here, as well as some good acting. There are also some good scenes