US backed Syrian militants attacks weakening taboo against chemical weapons: UN

‘UN Secretary General Ban Ki-moon says Syrian militants’ use of chemical weapons may weaken the “taboo” against the use of such banned agents.
In a letter sent to the United Nations Security Council on Monday, Ban said he is extremely worried that the use of chemical weapons could become “normalized in this or any conflict, present or future.”
The letter was written in relation to a report from the Organization for the Prohibition of Chemical Weapons (OPCW) covering the period from September 23 to October 22, when it was investigating the use of chemical agents in Aleppo by the request of the Syrian government.’
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