Win Double Oscars -- Joseph L. Mankiewicz (left) and Darryl Zanuck pose with Dr. Ralph Bunche (center) of the United Nations after they each won two awards at last night's Oscar Presentations. Mankiewicz' work on "All About Eve" won his honors: best direction and best screenplay. Zanuck produced the same picture, which was named the Oscar's best and also won the Irving Thalberg Memorial award for outstanding movie achievement. April 19, 1951.