Obama and his family spent Sunday at the rocky island prison where Nelson Mandela served the majority of his 27-year jail sentence. Their guide was Ahmed Kathrada, one of the former South African president's cellblock mates. Obama was silent as he examined Mandela's austere cell. It was here in the prison's damp confines that Mandela contracted Turberculosis, and the lung infections that would plague him for most of his life.
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