An unconscious Syrian child receives treatment at a hospital in Khan Sheikhoun, a rebel-held town in the northwestern Syrian Idlib province, following a toxic gas attack, on April 4, 2017. OMAR HAJ KADOUR/AFP
An unconscious Syrian child receives treatment at a hospital in Khan Sheikhoun, a rebel-held town in the northwestern Syrian Idlib province, following a toxic gas attack, on April 4, 2017. OMAR HAJ KADOUR/AFP