Anna Wintour: Sunglasses, Style, and Saying No

Anna Wintour, her trademark dark glasses firmly in place, sits before me. The enigmatic editor-in-chief of Vogue, a position she's held since 1988, is here to discuss her new exhibition, "VOGUE: Inventing the Runway," a deep dive into the history of the catwalk. But why the sunglasses? A shield? A simple vision problem? The answer, as it turns out, is far more complex.