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 I drive a 5 ton delivery truck here in Calgary and I saw this the other day.  I don't know where it was coming from or where it was going, although the building in the back graound with the green roof is the Big Rock Brewery.  The markings on the Huey were for Fisheries and Oceans.  I managed to shoot these out the window of my truck as I was waiting for the light to turn green.