One of the things that I most believe in is the compose and wait philosophy of photography. It’s a very satisfying, almost spiritual way to photograph. Life isn't’ knocking you around, life isn't controlling you. You have picked your place, you’ve picked your scene, you’ve picked your light, you’ve done all the decision making and you are waiting for the moment to come to you.

What I'm interested in is modern American history. I'm taken with the changes that have occurred in America in my lifetime.

I did a story for the Geographic on Meriwether Lewis and William Clark, and Stephen Ambrose was the writer. He said, "I've got the easiest job in the world. I just have to re-tell the story of the greatest fishing, camping, hunting, canoeing trip of all time. You, Sam, have the hardest job, which is, pretend like nothing has happened in the last 200 years.

It matters little how much equipment we use; it matters much that we be masters of all we do use.

It's more difficult now, to be a Geographic photographer, than it was when I came along. And it wasn't easy at that time.

First of all, I appropriate photographs.In presenting the Richard Prince photograph I tried to be as neutral as I could be. I put down the fact of it. I wanted it to be the same thing he wanted it to be, an open ended invitation to think about authorship, and who owns a created work. So I pair it with my appropriated picture.

One of the things that I most believe in is the compose and wait philosophy of photography. It’s a very satisfying, almost spiritual way to photograph. Life isn't’ knocking you around, life isn't controlling you. You have picked your place, you’ve picked your scene, you’ve picked your light, you’ve done all the decision making and you are waiting for the moment to come to you.