China is also developing its capabilities in terms of submarines and its fleet, as you've described. They are developing the capability to have ICBMs launched from submarines, to have submarine-launched ballistic missiles. Also, they are moving more towards mobile ICBMs rather than strictly silo-based ICBMs. Right now they're developing the capabilities, but we do not see any intent from China against North America.
You were talking about the north. China is also developing icebreaker capability. I think China is interested in going towards resources in the Arctic eventually, but China posses no threat at this time, from my understanding.