MIDEAST-CRISIS/SYRIA-IDLIB(01 of15)
Open Image ModalA man breathes through an oxygen mask, after what rescue workers described as a suspected gas attack in the town of Khan Sheikhoun in rebel-held Idlib, Syria April 4, 2017. REUTERS/Ammar Abdullah (credit:Ammar Abdullah / Reuters)
MIDEAST-CRISIS/SYRIA-IDLIB(02 of15)
Open Image ModalATTENTION EDITORS - VISUAL COVERAGE OF SCENES OF INJURY OR DEATH People stand near a dead body, after what rescue workers described as a suspected gas attack in the town of Khan Sheikhoun in rebel-held Idlib, Syria April 4, 2017. REUTERS/Ammar Abdullah (credit:Ammar Abdullah / Reuters)
MIDEAST-CRISIS/SYRIA-IDLIB(03 of15)
Open Image ModalATTENTION EDITORS - VISUAL COVERAGE OF SCENES OF INJURY OR DEATH A man carries the body of a dead child, after what rescue workers described as a suspected gas attack in the town of Khan Sheikhoun in rebel-held Idlib, Syria April 4, 2017. REUTERS/Ammar Abdullah TPX IMAGES OF THE DAY (credit:Ammar Abdullah / Reuters)
MIDEAST-CRISIS/SYRIA-IDLIB(04 of15)
Open Image ModalATTENTION EDITORS - VISUAL COVERAGE OF SCENES OF INJURY OR DEATH A man carries the body of a dead child, after what rescue workers described as a suspected gas attack in the town of Khan Sheikhoun in rebel-held Idlib, Syria April 4, 2017. REUTERS/Ammar Abdullah (credit:Ammar Abdullah / Reuters)
MIDEAST-CRISIS/SYRIA-IDLIB(05 of15)
Open Image ModalA man breathes through an oxygen mask as another one receives treatments, after what rescue workers described as a suspected gas attack in the town of Khan Sheikhoun in rebel-held Idlib, Syria April 4, 2017. REUTERS/Ammar Abdullah (credit:Ammar Abdullah / Reuters)
MIDEAST-CRISIS/SYRIA-IDLIB(06 of15)
Open Image ModalA civil defence member breathes through an oxygen mask, after what rescue workers described as a suspected gas attack in the town of Khan Sheikhoun in rebel-held Idlib, Syria April 4, 2017. REUTERS/Ammar Abdullah TPX IMAGES OF THE DAY (credit:Ammar Abdullah / Reuters)
Assad Regime's suspected chemical attack(07 of15)
Open Image ModalHATAY, SYRIA APRIL 4: An injured Syrian boy is being brought to Reyhanli State Hospital in Hatay, Turkey on April 4, 2017. Assad regime\'s suspected chlorine gas attack took place in Khan Shaykhun town of Idlib district of Syria. Injured people were brought to a state hospital, where safety measures were taken, in Reyhanli district of Hatay in Turkey.\n (Photo by Cem Genco/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
Assad Regime's suspected chemical attack(08 of15)
Open Image ModalHATAY, SYRIA APRIL 4: An injured Syrian man is being brought to Reyhanli State Hospital in Hatay, Turkey on April 4, 2017. Assad regime\'s suspected chlorine gas attack took place in Khan Shaykhun town of Idlib district of Syria. Injured people were brought to a state hospital, where safety measures were taken, in Reyhanli district of Hatay in Turkey.\n\n\n (Photo by Cem Genco/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
Assad Regime's suspected chemical attack(09 of15)
Open Image ModalHATAY, SYRIA APRIL 4: A Syrian girl is being brought to Reyhanli State Hospital in Hatay, Turkey on April 4, 2017. Assad regime\'s suspected chlorine gas attack took place in Khan Shaykhun town of Idlib district of Syria. Injured people were brought to a state hospital where safety measures were taken at the hospital in Reyhanli district of Hatay in Turkey. (Photo by Cem Genco/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
MIDEAST-CRISIS/SYRIA-IDLIB(10 of15)
Open Image ModalATTENTION EDITORS - VISUAL COVERAGE OF SCENES OF INJURY OR DEATH Men stand near dead bodies, after what rescue workers described as a suspected gas attack in the town of Khan Sheikhoun in rebel-held Idlib, Syria April 4, 2017. REUTERS/Ammar Abdullah (credit:Ammar Abdullah / Reuters)
MIDEAST-CRISIS/SYRIA-IDLIB(11 of15)
Open Image ModalA crater is seen at the site of an airstrike, after what rescue workers described as a suspected gas attack in the town of Khan Sheikhoun in rebel-held Idlib, Syria April 4, 2017. REUTERS/Ammar Abdullah TPX IMAGES OF THE DAY (credit:Ammar Abdullah / Reuters)
Assad Regime's suspected chemical attack(12 of15)
Open Image ModalHATAY, SYRIA APRIL 4: An injured Syrian boy is being brought to Reyhanli State Hospital in Hatay, Turkey on April 4, 2017. Assad regime\'s suspected chlorine gas attack took place in Khan Shaykhun town of Idlib district of Syria. Injured people were brought to a state hospital, where safety measures were taken, in Reyhanli district of Hatay in Turkey.\n\n\n (Photo by Cem Genco/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
Assad Regime's suspected chemical attack(13 of15)
Open Image ModalHATAY, SYRIA APRIL 4: A Syrian woman is being brought to Reyhanli State Hospital in Hatay, Turkey on April 4, 2017. Assad regime\'s suspected chlorine gas attack took place in Khan Shaykhun town of Idlib district of Syria. Injured people were brought to a state hospital, where safety measures were taken, in Reyhanli district of Hatay in Turkey. (Photo by Cem Genco/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
Assad Regime's suspected chemical attack(14 of15)
Open Image ModalHATAY, SYRIA APRIL 4: An injured Syrian man is being brought to Reyhanli State Hospital in Hatay, Turkey on April 4, 2017. Assad regime\'s suspected chlorine gas attack took place in Khan Shaykhun town of Idlib district of Syria. Injured people were brought to a state hospital, where safety measures were taken, in Reyhanli district of Hatay in Turkey.\n\n\n (Photo by Cem Genco/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
Assad Regime's suspected chemical attack(15 of15)
Open Image ModalHATAY, SYRIA APRIL 4: An injured man is being brought to Reyhanli State Hospital in Hatay, Turkey on April 4, 2017. Assad regime\'s suspected chlorine gas attack took place in Khan Shaykhun town of Idlib district of Syria. Injured people were brought to a state hospital, where safety measures were taken, in Reyhanli district of Hatay in Turkey.\n\n\n\n (Photo by Cem Genco/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)