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When the American billionaire Howard Hughes died in 1976, nobody had seen him in public for 20 years. Once dashing, powerful and almost unimaginably rich, Hughes slowly turned into the world's most famous recluse. Louise Hidalgo talks to the Californian journalist, Frank McCulloch, who met Howard Hughes face-to-face and stayed in touch with him for decades.

PHOTO: Hulton Archive/Getty Images