Russia says West has no proof Assad launched gas attack:

"[The] West is unable to present evidence of the involvement of the Syrian authorities in chemical attacks, but states that 'red line' in situation has been passed", said Lavrov, according to the Voice of Russia. "The use of force without the approval of the United Nations Security Council is a very grave violation of international law,"
http://www.haaretz.com/news/middle-east/1.543636
 
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