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A Syrian man carries an injured child in the northern city of Aleppo on April 12, 2015, following a reported Syrian regime air strike on Saad Ansari school that killed five children and four other civilians, the Syrian Observatory for Human Rights said. AFP PHOTO / AMC / ZEIN AL-RIFAI (Photo credit should read ZEIN AL-RIFAI/AFP/Getty Images)

A Syrian man carries an injured child in the northern city of Aleppo on April 12, 2015, following a reported Syrian regime air strike on Saad Ansari school that killed five children and four other civilians, the Syrian Observatory for Human Rights said. AFP PHOTO / AMC / ZEIN AL-RIFAI        (Photo credit should read ZEIN AL-RIFAI/AFP/Getty Images)