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Photo by: Dario Lopez-Mills

Mexican telecommunications tycoon Carlos Slim speaks during news conference at the Soumaya Museum in Mexico City on Monday, Jan. 14, 2013. Mr. Slim remains the world's richest man for the fourth year in a row, Forbes says, while Warren Buffett dropped out of the top three for the first time since 2000. (AP Photo/Dario Lopez-Mills)

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