I'm a constant editor. Every few months or so I make a ton of 4x6 prints. I put them on a magnetic board and I live with them for a while to see what bubbles to the surface. A lot of this was part of Disco Night originally, and I suddenly started realizing, "If I keep working on this because I'm not done and I put all that in Disco Night, how can this be one book? Is it going to be too long and bloated and crazy?".

Nothing is over until there's something more decisive than your own thoughts.

At first Disco Night wasn't meant to be a book, although I'm always thinking about that in the back of my mind. It started off as a series of exploratory road trips that I was doing with Christian Hansen, who I dedicated the book to.

I think a lot of the work I've done and a lot of the work I'm going to do in the future still ties to 9/11 and the fallout from it.

I began to explore America in more general terms. I really started this work in 2009. I got the bulk of it done as I was easing out of Disco Night.

I realized how little I knew about my own country. I had grown up in the suburbs and, after college, I moved out of the country, so I didn't really know the place well. When I started following soldiers and their families back home, it provoked a lot of the questions about who we are as a nation, questions I realized couldn't be explored through the more limited framework of looking at the military at war and at home.

[The Middle East conflict ] just kind of ran its course for me. For a long time I could justify doing it to myself, no matter how irrational it was. It was important to me and my work. And I just don't feel it in the same way any more. When it comes up and it's important to me, I'll do it, but more out of sense of duty than desire - which used to be a big part of it.