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The Engineering Assessment of Two Cylinders Observed at the Douma Incident has come to light after communications between the
Working Group on Syria, Propaganda and Media and OPCW staff members.

Below is the introduction from the WGSPM and a link to the document:

“In our Briefing note on the Final Report of the OPCW Fact-Finding Mission on the Douma incident, we noted that the FFM had sought assessments in October 2018 from unidentified engineering experts on the “the trajectory and damage to the cylinders found at Locations 2 and 4”. The Final Report provided no explanation for why the FFM had not sought engineering assessments in April 2018, when the experts could have inspected the sites with cylinders in position, rather than six months later when inspection of the sites with cylinders in position was no longer possible and the assessments had to rely on images and measurements obtained by others. We raised this as an obvious anomaly.

OPCW staff members have communicated with the Working Group. We have learned that an investigation was undertaken by an engineering sub-team of the FFM, beginning with on-site inspections in April-May 2018, followed by a detailed engineering analysis including collaboration on computer modelling studies with two European universities. The report of this investigation was excluded from the published Final Report of the Fact-Finding Mission, which referred only to assessments sought from unidentified “engineering experts” commissioned in October 2018 and obtained in December 2018.

A copy of a 15-page Executive Summary of this report with the title “Engineering Assessment of two cylinders observed at the Douma incident” has been passed to us and we have posted it here. Please download and share this document via your own server if you link to it, so as not to overload our server.

We are studying this document, and encourage others with relevant expertise to contribute. We provide some initial comments below:-“

See WGSPM comments here

Link to report: