FILE - In this Tuesday, July 8, 2008 file photo, boatswain Bob Taylor, of Halifax, watches as a box corer is lowered from the Canadian Coast Guard icebreaker Louis S. St-Laurent in the Davis Strait. The device gathers mud and sediment from the bottom of the ocean floor. The Louis is on its annual voyage to Canada's Arctic which will include patrols through the Northwest Passage. In addition to serving the people of Canada's North the ship is carrying a team of scientists studying climate change and the health of Canada's three oceans. (Jonathan Hayward/The Canadian Press via AP)
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