Our biggest art forms are film and television, and there hasn't been a great film about 9/11 yet, nor has there been a great television series. Something like The Wire gives us a rich and fully achieved picture of the wasteful, cruel War on Drugs; something like The White Ribbon gives a perspective on World War I that could only have been presented long after the event itself.

What's interesting about Twitter is the unmediatedness of it, the directness of it. I'm on a train somewhere in New York and I send out a tweet. Somebody sitting at dinner in Bombay checks their phone and they see it.

Each neighborhood of the city appeared to be made of a different substance, each seemed to have a different air pressure, a different psychic weight: the bright lights and shuttered shops, the housing projects and luxury hotels, the fire escapes and city parks.

There's a reticence necessary when you consider the suffering of others. Into the space created by that reticence, you bring in those things that best help us confront ambiguity: music, painting, film, and so on.

I adore imaginary monsters, but I am terrified of real ones.

The strange thing, though, is that most people who write novels these days seem to be aware of only a fraction of its possibilities. Kundera goes on and on about this, and I never tire of reading him on the subject, because I agree very deeply with it.

If you see a theme that you might want to take a photo of, you sort of stand there for an hour waiting for it to resolve, waiting for the geometry of a theme to be exactly what you want them to be. That was my process to get photos.