Billionaires Carlos Slim And Bill Gates Announcement On...

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Billionaires Bill Gates, left, and Carlos Slim hold a news conference... News PhotoAgriculture,Bill Gates,Capital Letter,Carlos Slim,Charity and Relief Work,Farm,Finance,Horizontal,Mexico,North America,Press Conference,The Americas,The Media,USA,WealthPhotographer Collection: Bloomberg 2013 BloombergBillionaires Bill Gates, left, and Carlos Slim hold a news conference to announce donations to Mexico's International Maize and Wheat Improvement Center, known by its Spanish initials as CIMMYT, in Texcoco, Mexico, on Wednesday, Feb. 13, 2013. The group, which performs research for agricultural productivity, will open its research facility this week. Photographer: Susana Gonzalez/Bloomberg via Getty Images