Hillary Clinton
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Hillary Clinton in hospital with blood clot

31 December 2012 Last updated at 18:17 GMT

US Secretary of State Hillary Clinton has been admitted to hospital in New York with a blood clot, officials say.

Mrs Clinton suffered a concussion earlier this month after fainting and falling down.

At the time, she was reported to have had a stomach virus and to have passed out after becoming dehydrated.

Paul Adams reports.