That may be a better question for General St-Amand. I will tell you that investments are being made to support research and development, shared between Canada and the U.S., for what the replacement system will look like given the threats you've pointed out.
Looking at air-launched cruise missiles and their capability, the detection of them is a challenge moving forward. There are a number of ways to build a system: from space, terrestrial, from the air. That is a real challenging area, and certainly a consideration that we spend a lot of time thinking about.
I would think the plans right now, though, would see the north warning system replaced in the latter part of the next decade, from 2025 to 2030, but I don't have any more precision on that, Ms. Gallant.