 AP correspondent Haya Paswani reports on the death of an Oscar-winning producer behind some of the biggest blockbusters. John Landau, an Oscar-winning producer who worked closely with director James Cameron on Titanic and the Avatar series, has died. He was 63. No cause of death was given. Landau's partnership with Cameron led to three Oscar nominations and a Best Picture win for 1997's Titanic. Together the pair account for some of the biggest blockbusters in movie history, including Avatar,