I think the SIGINT stations that you mentioned, from where I sit, are adequate. Where we sit we don't care where the information comes from, it's just that it gets to us and then we are able to the fusion of that information.
As far as domain awareness is concerned, we're starting to have a concern about the refurbishment and replacement of the north warning system, which is the line of radars along the Canadian air defence identification zone. We expect its life expectancy to be 2025 to 2030.
It really takes a long time to build in the north and given that we need to study what is the best system of systems to replace that system and refurbish it—it could be space-based, it could be land-based, it could be maritime-based—we need to talk about the replacement of the north warning system in the north now.