Let me begin, and then I'll pass it over to General Prévost.
We have been working very closely with the United States on Arctic issues more broadly. It's one of the key elements of the road map that we have with the United States. We do that on a range of issues, but I know you're most interested in security, so I'm going to turn it over to General Prévost, who can speak in particular to some of the work going on in NORAD and other items.
General Prévost, it's over to you.