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Will US reach deal over debt in time?

In the United States there is still no deal on raising the country's borrowing limit. With Tuesday's deadline looming, leading Senators and Congressmen are planning to work through the weekend to try to broker a deal urged on by another televised appeal by President Obama.

If they fail the world's largest economy could default on its debts or simply run out of money for things like pension payments.

Mark Mardell reports.

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