I would categorize the evolution of the threat as incredible. General VanHerck actually always says that the current environment is one of the most complex he has seen since he started his career, and I would echo that.
What we have seen is that both Russia and China have looked at the way we have done business over the last 15 years, and even more. They have fielded capabilities now to hold us at risk, not only in terms of persons, but also in terms of our critical infrastructure, both in the U.S. and Canada, using conventional means.
Those two countries used to leverage their nuclear weapons as their deterrence mechanism, but now they have advanced their capability to actually hold the critical infrastructure in both countries at risk, using conventional capabilities that can be delivered now from long-range aviation, as well as very stealthy submarines that are going to be available on both coasts. Both the Atlantic and the Pacific are of concern to us.
The challenge has been increased, as well, by their ability to deliver those threats from a range well beyond the current detection range of the North Warning System. That's why we're looking at systems, whether space-based, air-based, ground-based or subsurface-based, in order to detect those threats and the vehicles carrying them as far from our coast as possible.
General VanHerck always referred to how detection and deterrence starts abroad and moves in. So we're also relying on the capability provided by NATO and our allies in Europe and in the Indo-Pacific to help us in our detection and aerospace warning and aerospace control mission as well.