Maybe I'll ask one final question, which I'm sure needs a lot more explanation, so maybe other people will pick it up.
You talked about concerns in the north, the Arctic, with regard to climate change and the fact that it needs to be more accessible. There's just so much that needs to go into how we defend the Arctic. I mean, this is less than a 60-second answer. What are some of the things that we need to start doing to be able to have a presence up there and to start being able to defend the Arctic, so to speak?