Interoperability is one of those issues that we hold very high in our requirements, I would say.
If you think back to the foundation of NATO, and Canada was a founding member, there was the ability to define standards that allow us to work easily with our partners. Those types of interoperability standards came as a result of thousands of casualties that the allies had during World War II. We've learned—and we've paid in blood—that we have to be able to work closely with our partners and allies.
When we look at an air domain perspective and the ability to defend North America, that's something we very much do with the United States through our binational relationship through NORAD. By the same token, when we deploy forces with a NATO force, we have commonality in terms of our doctrine, training and equipment so that our radios can talk to each other, for example, and our data links can share critical operational information.
In short, interoperability is incredibly important for our ability to work with our allies.