You can ask yourself, if a film makes a claim, is the claim true or false? Having said that, a style of presenting material doesn't guarantee truth. There's this crazy idea that somehow you pick a style, and by virtue of picking the style, you've provided something that is more truthful. It's as if you imagine that changing the font on a sentence you write makes it more truthful.

When you start talking about the known knowns and the unknown unknowns, you're thrown into a crazy meta-level discussion. Do I know what I know, do I know what I don't know, do I know what I don't know I don't know. It becomes a strange, Lewis Carroll - like nursery rhyme.

Forty years ago this country went down a rabbit hole in Vietnam and millions died. I fear we're going down a rabbit hole once again - and if people can stop and think and reflect on some of the ideas and issues in this movie, perhaps I've done some damn good here!

I've done interviews in one day that went on for fifteen, sixteen hours. And at a certain point, the control over what they're saying breaks down; it becomes different. It becomes really powerful, and for me, real. It becomes out of control.

The perfect war is started for obscure reasons, is hopelessly murderous, and accomplishes nothing.

A movie is like a tip of an iceberg, in a way, because so little of what you do in connection with making a movie actually gets into the movie. Almost everything gets left behind.

I used to say that interviewing others was perhaps the way I could stop talking and start listening. It's a kind of enforced silence.