It seems to be a big day in climate security issues in the arctic:
Does the Northwest Passage still matter?
The Canadian Globe and Mail says that Canada should protect its sovereignty in the Northwest passage, but it may be superceded by a direct over-the-pole route, should melting continue.
In Parting Move, Bush Sets Arctic Priorities
The New York Times' "DotEarth" blog reports that the Bush Adminstration issued new national security directives asserting free navigation in the arctic, through both Canadian and Russian waters.