Occupation: President of the United Arab Emirates and Emir of Abu Dhabi
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Sheik Khalifa has managed to avoid the debt problems that have plagued the U.A.E. city of Dubai, enabling him to come to its financial rescue this past winter. His reward? The world's tallest man-made structure, the Burj Dubai, was renamed in his honor. He remains one of the world's wealthiest people, with estimated assets of $19 billion.
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