Russian explorers dived deep below the North Pole in a submersible on Thursday and planted a national flag on the seabed to stake a symbolic claim to the energy riches of the Arctic.
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Canada mocked Russia's ambitions and said the expedition was nothing more than a show.
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"This isn't the 15th century. You can't go around the world and just plant flags and say 'We're claiming this territory'," Canadian Foreign Minister Peter MacKay told CTV television.
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