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Syrian scientist with alleged chemical weapons ties traced to Canada

WARNING: This video contains graphic content. Viewer discretion is advised. New details are surfacing about a senior scientist suspected of helping Syria develop its chemical weapons program. Ahmad Haytham Alyafi has been deemed a danger to Canadian security, but Global News has learned he was quietly living in Edmonton. Heather Yourex-West explains what recently declassified documents suggest, and what neighbours are saying about him.