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Rally in Support of Chibok Schoolgirls Abducted by Boko Haram, Lagos, Nigeria, May 5, 2014 (Pius Utomi Ekpei/AFP/Getty Images).

Rebel fighters inspecting the wreckage of a Syrian army helicopter after Islamic State of Iraq and the Levant (ISIL)'s fighters allegedly destroyed it when they left the Meng Military Airport, Aleppo, March 1, 2014 (MOHAMMED AL-KHATIEB/AFP/Getty Images)

Egyptian soldiers are seen standing guard in military vehicles in Cairo's Tahrir square on January 26, 2014 the day after thousands of demonstrators protested in the square. (AHMED TARANH/AFP/Getty Images)

Timbuktu, Mali, January 31, 2013 (Fred Dufour/AFP/Getty)