Bill Gates, co-chair of the Bill & Melinda Gates Foundation speaks at the news conference at the XVIII International AIDS conference in Vienna, Austria, on Monday, July 19, 2010. Photographer: Vladimir Weiss
Bill Gates, co-chair of the Bill & Melinda Gates Foundation speaks at the news conference at the XVIII International AIDS conference in Vienna, Austria, on Monday, July 19, 2010. Photographer: Vladimir Weiss
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