File:Khan Shaikhoun White Helmets cave with ambulance.jpg

IDLIB, SYRIA - APRIL 4: (EDITORS NOTE: Image contains graphic content) Civil defense members carry out search and rescue works after Assad Regime forces's attack with chlorine gas to Khan Shaykhun town of Idlib, Syria on April 4, 2017. (Photo by Firas Faham/Anadolu Agency/Getty Images)
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 * 2017 Anadolu Agency
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 * http://www.huffingtonpost.gr/2017/04/04/diethnes-syria-aeroporiki-epithesi-me-toxiko-aerio_n_15797816.html
 * https://www.alaraby.co.uk/politics/2017/4/4/العالم-يندد-بمجزرة-خان-شيخون-وجلسة-طارئة-لمجلس-الأمن