The standards for security are set by government, so you're going to see variation by country based on the regulation applied nationally. It's government accountability to set that standard. You see variation in process between Heathrow and Hong Kong because they operate in different regimes. That's number one.
Number two, in terms of what Canada needs, we need to ensure that the experience of the traveller is consistent and that, whether you are a trusted traveller—a NEXUS card-carrying customer—it's an experience that is similar across airports, and that's one area of significant opportunity with the DSA.