Mohsen Makhmalbaf

When we began filming, these people had legs, but as we were filming, they had been injured and they were brought to the hospital to have their legs amputated, and that's where we found them and asked them to come and be part of the film.

By irreducibly complex I mean a single system composed of several well-matched, interacting parts that contribute to the basic function, wherein the removal of any one of the parts causes the system to effectively cease functioning.

I do spend a lot of weekends on the road. I have to pace myself. It can be pretty busy, but I'm not out in the Afghan desert with 70 pounds on my back, away from my family for a year at a time. I keep a good perspective on it.