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In canadas largest port. >> well see the container ships coming in and tons of tows working in the harbor and it is very much business as usual. >> reporter: but it is a big city with a multitude of potential targets like transportation hubs. >> there are infinite places where things can occur and there cannot be a presence in all of them. >> reporter: some events will be held at the whistler ski area two hours north of the city, requiring a whole different set of security measures. >> our soldi...