2013
Syria chemical attack: What we know
http://www.bbc.com/news/world-middle-east-23927399
Syrian chemical attack used sarin and was worst in 25 years, says UN
https://www.theguardian.com/world/2013/sep/16/syrian-chemical-attack-sarin-says-un
2015
Syria civilians still under chemical attack
www.bbc.co.uk/news/world-middle-east-34212324
2016
UN blames Syria forces for third chemical attack
https://www.aljazeera.com/news/2016/10/blames-syria-forces-chemical-attack-161022033828052.html
Almost 1,500 killed in chemical weapons attacks' in Syria
https://www.theguardian.com/world/2...acks-almost-1500-killed-report-united-nations
2017
Worst Chemical Attack in Years in Syria; U.S. Blames Assad
https://www.nytimes.com/2017/04/04/world/middleeast/syria-gas-attack.html
Linea de tiempo de los ataques quimicos a la población Siria.
► April 29, 2011:
The U.S. puts sanctions on Syria's intelligence agency in response to the regime's crackdown on protesters during the "Arab Spring."
► Aug. 18, 2011:
President Obama — along with the leaders of Britain, France and Germany — calls for
Assad to step down.
► Aug. 20, 2012:
Obama warns Assad the use of chemical or biological weapons would cross a "red line" for the U.S.
► Dec. 3, 2012:
Obama tells Assad: "The use of chemical weapons is and would be totally unacceptable, and if you make the tragic mistake of using these weapons there will be consequences, and you will be held accountable."
► March 19, 2013:
More than two dozen people, including several Syrian soldiers, die in a
sarin gas attack in northern Syria. The government and rebels each blame the other for the incident.
► June 13, 2013:
The White House announces U.S. intelligence believes Assad used chemical weapons and vows to increase military aid to the rebels.
►Aug. 21, 2013:
Hundreds of men, women and children are gassed with the banned nerve agent sarin in an attack near Damascus. The U.S. blames the Syrian government.
►Aug. 31, 2013:
Obama says he has authorized the use of force against Syria but will seek authorization from Congress before carrying out strikes.
►Sept. 27, 2013:
The U.N. calls on Syria to destroy its chemical weapons stockpile.
►Oct. 14, 2013:
Syria signs the Chemical Weapons Convention, strictly prohibiting chemical weapons.
►June 23, 2014:
The Organization for the Prohibition of Chemical Weapons says it removed the last of Syria's chemical weapons.
►Sept. 22, 2014:
The U.S. launches its first airstrikes against ISIS forces in Syria.
►April 2015
Syrian groups in Idlib province say barrel bombs containing
chlorine were dropped.
►Oct. 30, 2015:
Obama authorizes the deployment of U.S. military advisers into Syria to combat ISIS.
►August and September 2016
Hospital officials and activists in Aleppo say chlorine gas is used in attacks.
The UN's special envoy to Syria said an attack with chlorine gas in Aleppo Syria would be "a war crime" if such an attack is confirmed. His comments come after a Syrian rescue worker said three civilians have died in such an attack. (Aug. 11) AP
►Feb. 28., 2017:
Russia and China veto a U.N. Security Council resolution authorizing sanctions against Syria for chemical weapons use.
►April 4, 2017:
An attack on a rebel-held city in northern Syria kills at least 86 people, 27 of them children. Autopsies on three Syrians who died after being brought to Turkey for treatment suggest sarin was used in the attack.
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