Microsoft co-founder Bill Gates looks at a display while his wife Melinda Gates speaks to the media at an advance tour of the newly constructed $15 million visitor center of the Bill and Melinda Gates Foundation $500 million campus in Seattle, Washington February 1, 2012. The 900,000 square foot construction, which occupies more than 12 acres in downtown Seattle, is scheduled to open to the public on February 4, 2012. REUTERS/Anthony Bolante

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