Well, we can say immediately, of course, that we do have to update the existing architecture of the north warning system. In other words, the Russians are in the process of modernizing not only their nuclear war-fighting tactical capabilities that we see with the Gazelle missiles and other types; they're also modernizing their ICBMs. We have to continue to have that capability to monitor that threat. That means that the RADARSAT systems have to be updated.
We also need to have the ability, however, to be able to detect the Gazelles, the hypersonics. That requires, of course, a system such as the over-the-horizon radar, but it also requires a mobility. In other words, the Arctic is so large that you are not going to be able to have the old-fashioned DEW line system where you can string a set of radar sites across and have a high degree of confidence that you're going to catch everything. You've got to be able to have an anticipation. That then means that you also have to be developing new space-based systems.
The only way we're going to have a proper surveillance capability of being able to anticipate what the Russians are doing in terms of aerospace—I would add the Chinese as well, going to into a little bit longer future—is to have radar sensors. Now, that means, obviously, that we have to tie ourselves much closer with the American space weapons systems, which will be problematic for some people on a political basis.
There's another part, though. You also need to have the ability to respond. It's not just simply having these three-layered sensor systems. We also have to be talking about what it means in terms of ABM capabilities and what it means in terms of being able to take out these hypersonics. That's another layer of anti-ballistic missile. We're also going to have to do anti-missile systems unless we're willing to have the Americans simply bring us around and do it entirely for us.