Though Geographic didn't publish that photo in the story that it was done for, "The Life of Charlie Russell," a cowboy artist in Montana. But later, maybe a year and a half ago, they named it one of the 50 greatest pictures ever made at National Geographic.

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.

When I first went to 'National Geographic,' I thought I was the least qualified person to step through the doors. But because of my parents and the culture of continual learning they imposed on us, I later came to believe I was the most qualified person who ever worked there.

But there is more to a fine photograph than information. We are also seeking to present an image that arouses the curiosity of the viewer or that, best of all, provokes the viewer to think-to ask a question or simply to gaze in thoughtful wonder. We know that photographs inform people. We also know that photographs move people. The photograph that does both is the one we want to see and make. It is the kind of picture that makes you want to pick up your own camera again and go to work.

The class that I teach is called "The Life of a Photograph." It takes up the question, of the billion photographs that were taken today, how many will have a life, and why? So the new reality has made the question more pertinent, not less pertinent.

I was asked by a student what my most significant accomplishment was at National Geographic, after thirty years, and I said that my career came to an appropriate close, and I still loved photography. Not everybody who spends their career at anything ends up fascinated and involved with it.

Photographs that transcend but do not deny their literal situation appeal to me.