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ATHENS, GREECE - MARCH 21: Schoolchildren form a human chain around the ancient Parthenon temple at the Acropolis archaeological site to mark the International Day Against Racism on March 21, 2014 in Athens, Greece. Around two thousand children gathered atop the Acropolis hill on Friday to mark the International Day for the Elimination of Racial Discrimination. (Photo by Milos Bicanski/Getty Images)

ATHENS, GREECE - MARCH 21:  Schoolchildren form a human chain around the ancient Parthenon temple at the Acropolis archaeological site to mark the International Day Against Racism on March 21, 2014 in Athens, Greece.  Around two thousand children gathered atop the Acropolis hill on Friday to mark the International Day for the Elimination of Racial Discrimination.  (Photo by Milos Bicanski/Getty Images)