2. Joe McNally

McNally's career has spanned over 30 years and includes covers for TIME, Newsweek, and The New York Times Sunday Magazine. McNally is a longtime contributor to National Geographic and the author of Face of Ground Zero. McNally has been considered by some as "the most versatile photojournalist working today." His experience extends beyond portraiture into the realm of architecture, dance, and landscape. He even shot National Geographic's first fully digital story, entitled "The Future of Flying," in December 2003.

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Above: The Future of Flying, 2003