World Summit Of Nobel Peace Laureates Held In Chicago [Getty Images]

CHICAGO, IL - APRIL 25: Professor Muhammad Yunus chats with guests at the World Summit of Nobel Peace Laureates at the Chicago Symphony Orchestra Hall on April 25, 2012 in Chicago, Illinois. The 12th World Summit of Nobel Peace Laureates ends today following three days of events. (Photo by Scott Olson/Getty Images)

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