Cruise the canals of Venice, amid the grand palazzos and Rialto Bridge, and it's understandable why this iconic city is now home to one of fashion's most iconic names: Diane von Furstenberg.She spends about five months of the year in Venice: "It's my stage," she said. "It's where I think." Correspondent Alina Cho and designer Diane von Furstenberg in Venice. CBS News Now 79, von Furstenberg, or DVF, burst onto the scene in the 1970s. What made her famous? A single item of clothing inspired by the tops ballerinas wear, a little dress that was comfortable, practical and affordable. Dane...