I always believe you have to show the symbolism of a civilization, whether it be the cave drawings or somebody drawing in the sand in Darfur to show a massacre.

For me, Katrina was my first trip back to the United States, but the most important thing, it showed everything that I had seen in other places. As I've said before, it looked like a bomb had hit a lot of places. I'd never seen such force, and it was Mother Nature.

You have this kind of cross between abandonment and savior, and I think it's going to show that how a government as powerful as America is was able to drop the ball so badly, then maybe it can be used as a textbook in the future.

These are the kind of things I always zero in. When I was in Rwanda, it was the same thing. You're always zeroing in those details. Not just always the bodies, but what makes up the human being.