Photo credits (left to right): marcel antonisse/anefo/wikimedia; wikimedia; devra berkowitz/un; jonn leffmann/wikimedia; janwikifoto/wikimedia; columbia university school of general studies/wikimedia; below: wikimedia; bettmann/corbis; evan schneider/un; arild vågen/wikimedia; bettmann/corbis; leo rosenthal/pix inc./the life images collection/getty; ulf andersen/getty
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