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The Noble Discoverer, right, which Shell Oil plans to use for Arctic drilling, slipped its mooring Saturday.
The Noble Discoverer, right, which Shell Oil plans to use for Arctic drilling, slipped its mooring Saturday.

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    2013: Shell's arctic drilling underway

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2013: Shell's arctic drilling underway

A major exploratory drilling plan is underway off the coast of Alaska. Miguel Marquez reports from that oil rig.

2013: Shell's arctic drilling underway

A major exploratory drilling plan is underway off the coast of Alaska. Miguel Marquez reports from that oil rig.