There are photos of Kim Jong-un right up atop the volcano. I actually wrote a letter to him asking if I could speak on camera. I never got an answer. But what was interesting was the people who were responsible for us, our "guards," it took them two days to figure out how I should address him. "President? No, you can't because there's a president for eternity." And it was a time when his status was still in flux. Only a few months later there was this party congress which assigned an official title to him, but that was after we did our film.

Most of the volcanoes are pretty far away. You have to go to, God knows, Alaska. Or you have to go to the Southern Indies or you have to go to a specific island.

I have learned a lot through defeats, and, until today, it's - I'm still haunted by defeats, and they do happen. Sometimes, a film of mine is rejected. And how do you deal with it? And you have to learn how to deal with it and survive anyway.

Some of the most important caves, like Lascaux in the Dordogne region in France, have had to be closed down. There had been too many people allowed in, and they left a mold on the walls that is spreading and which can't really be stopped.

Of course, you do not do any research: you have to go there and do your film. It's not that I would travel there before without a camera and spend half a year on one of those volcanoes and then come back with a camera. You have to have some sort of a clear mindset.

We do not see the danger clearly enough that we develop images adequate to our state of civilization. When you watch TV, you know instantly that there's something wrong with the images. When you open a magazine and see the ads, you know there's something wrong with the images. And it's unhealthy and not good and outright dangerous, in my opinion.

Everything that I've done was prudent and never has anyone gotten hurt in my films - not a single actor, not a single extra, ever.