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FBI man 'betrayed double agents'
The FBI has admitted that one of its most senior men spied for the Russians for 15 years. Robert Hanssen sent agents to their deaths, and sold the country's most sensitive secrets for around one and half million dollars. The FBI's directors said what Hanssen had done amounted to the "most traitorous actions imaginable". Hanssen could now face the death penalty. The BBC's Nick Bryant reports.

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