I still think it's not going to be all NATO countries; not all of them can operate in the Arctic. It's going to be the same NATO countries that we have seen.
The primary deterrent to the North American Arctic has been via NORAD. I don't see that changing. What we are looking to do is exchange more information, and also link the various exercises, for example Arctic Edge by the U.S., Operation Nanook by Canada, and the NATO exercises, so that we send a strategic message to Russia that we are operating together, that we practise different things, and certainly to invite them to these exercises so we can build that trust and confidence.