All soil samples, fragments and shells with the same sarin found in Aleppo were long ago handed over to the U.N. by the Russian Aerospace Forces, but this evidence has been ignored.
Former CIA officers say chemical attack in Syria wasn´t conducted by Assad nor by Russia. Sarin attack in Syria in 2013 was a false flag.
No evidence for these claims given. Zerohedge notoriously spreads unverifiable conspiracy theories. See the timeline of Syrian chemical weapons activity since 2012: bit.ly/2oNf0FO, // See the cover note for detailed debunk.