Documentary has become a kind of new space in the culture. A...

Documentary has become a kind of new space in the culture. A lot of the films are about social concerns, and in a way, are a new form of media. . . . Making a documentary has become sort of trendy, a little like what writing children's books was a few years ago. But what I've noticed is, once documentary filmmakers get locked in, they really get locked in. They may have started off thinking they're going to do something relatively quick and casual, and then it takes them over.