Watch CBC Documentaries online: Episode 3 Battle for the Arctic

The Arctic is under siege as never before. The Russians send submarines deep below the North Pole. The Americans dispatch surveillance planes to monitor new threats in the north. And Canada is now forced to scramble to defend territories it has ignored for too long. Canadian scientists are now joining the soldiers on the front lines of this new frontier, as they race to chart Canada's Arctic claims under the looming deadline of an international treaty. The Battle for Arctic takes you from the far reaches of the North Pole to the waters of Alaska for a look into a struggle for sovereignty that could change the very face of Canada.

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