Okay.
I can give you an example. The TIC3 Air project, which I just mentioned, involves new radios with the capacity to do what we call—
beyond-line-of-sight, data link passage. We could put that across the entire country: north, south, east, and west. That would be very expensive. We've had options.
When we look at our airspace, where should we have the most protection in that regard? To answer the earlier question, over our major cities so that we have the capacity to act very quickly, to some of the near north. But again, it all depends on how much you want to invest. The north warning system today does not cover all Canadian territory.