A picture shows on July 12, 2017 the entrance of Khan Sheikhun, a rebel-held town in the northwestern Syrian Idlib province, 100 days following a suspected toxic gas attack that was reported to have killed 88 people, including 31 children. The Britain-based Syrian Observatory for Human Rights labeled the raid the second deadliest use of chemical weapons in Syria's six-year conflict. Western powers hold President Bashar al-Assad's forces responsible. / AFP PHOTO / Omar haj kadour (Photo credit should read OMAR HAJ KADOUR/AFP/Getty Images)
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