Sure, I can comment on that from an intelligence perspective.
When we look at the Arctic, we can see that there are certainly multiple actors in the Arctic—Russia is the primary example—and there are people who do things in the Arctic who we watch closely and occasionally find of concern. But there's nothing that we consider direct threats to Canada, or to North America, for that matter.
They're not doing anything up there that they don't have a sovereign right to do. They're working in international airspace. They're working largely within rules that we all respect internationally.