BANGUI, CENTRAL AFRICAN REPUBLIC - MARCH 14: A girl working out sums at the blackboard during a math lesson at the refugee camp 'St Sauveur' which comprises around 20,000 predominantly Christian refugees but includes 1% Muslim refugees as pictured on March 14, 2014 in Bangui, Central African Republic. (Photo by Thomas Koehler/Photothek via Getty Images)
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Photothek Thomas Koehler