Tania Ketenjian speaks with Sandra Phillips, senior curator of photography at the San Francisco Museum of Modern Art, about the 2009 exhibit Richard Avedon: Photographs 1946—2004. The exhibition spans Avedon's entire career, from fashion photography at Harper's Bazaar, where Avedon began working at the age of 22, to his more recent works, among them his iconic images of politicians, bee keepers and celebrities. Phillips takes us through the entire exhibition and here explains how Avedon captured the infamous shot of the Duke and Dutchess of Windsor (30 minutes).