Global News Hour at 6 BC August 9 2016 9:05pm 01:28 New drug carfentanil seized at Vancouver airport The super powerful drug carfentanil was seized by the CBSA in Vancouver. It is 100 times more powerful than fentanyl. Catherine Urquhart has more. What is carfentanil? Deadly street drug is causing mass overdoses in the US Responsive site?