I expected this question, and it's interesting because, first of all, this is not the 1960s, 1970s or 1980s, when Russian submarines might be lurking behind every corner. These days, based on technological advances, as you're well aware, the Russians can launch weapons against North America from their home bastions within their territory or slightly outside. The notion that Russian submarines, for example in this case, would have to travel underneath the ice in Canada's north to do their business is technologically out of date.
The plan we talk about when we talk work surveillance in the Arctic is Operation Limpid, an all-domain program we have to understand what's going on in the airspace, the waterways and underneath the ocean. Specifically, with respect to the underwater space, that is also a domain for Operation Limpid, as is the cyber domain, which is a part of it.
The key element for us in monitoring what's going on in the north is our relationship with NORAD and NORTHCOM. NORAD has a maritime domain awareness mission in addition to a control mission not in the maritime domain, and it's through that partnership with NORAD that we maintain awareness throughout Canada's land mass and underneath the ocean. It's that information that we share with the Americans and our allies and partners that allows us to be aware of what's going on below the surface on any given day of the year.