The massively influential filmmaker and blockbuster machine behind 'The Terminator,' 'Aliens,' 'Titanic' and three 'Avatar' films, among others, reflects on his unusual path to the business, why his films tend to blend science/sci-fi and love stories, what has enchanted him about Pandora and the Na'vi for more than 30 years, and which question he hopes never to be asked again.

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