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A former soldier who has early-onset Alzheimer's disease is raising money to research the condition that has devastated his family. Chris Graham carries a gene mutation which affects just a few hundred families worldwide. At the age of 39, he is already showing symptoms of the disease, which killed his father aged 42. Chris has been speaking to Newsday's Nkem Ifejika. (Photo: Chris Graham. Credit: Â鶹Éç)