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Berlin, Germany - November 11: Bill Gates, Founder of Bill and Melinda Gates foundation, waits for his meeting with German Chancellor Angela Merkel (not pictured) in chancellery on November 11, 2014 in Berlin, Germany. (Photo by Michael Gottschalk/Photothek via Getty Images)

Berlin, Germany -  November 11: Bill Gates, Founder of Bill and Melinda Gates foundation, waits for his meeting with German Chancellor Angela Merkel (not pictured) in chancellery on November 11, 2014 in Berlin, Germany. (Photo by Michael Gottschalk/Photothek via Getty Images)