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  • Former President Trump found in contempt of court over subpoenaed documents

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  • Dual citizen charged for allegedly acting as Russian agent in U.S.

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    Environmental emergency: What caused the Arctic oil spill?

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Environmental emergency: What caused the Arctic oil spill?

08:10

In what environmentalists believe to be the biggest oil spill in the Arctic Circle, 20,000 tonnes of diesel flowed across the Siberian landscape. NBC News Forensics investigates the cause of the Norilsk disaster, why it took so long to respond and how far the pollution spread.