Domestic/International

Travel between the US and Canada is common (I've been known to do it myself) and as a consequence of that, the US has their own customs agents at many (all?) Canadian airports (the rest of the security people for travel to the US might even be TSA? I don't remember off-hand). A consequence of this is that many Canadian Airports end up having two sections: US and Domestic/International. Accidentally stumbling into the truth about the US's place in the Canadian psyche