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Newday Chafee interview running _00010329

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    Should U.S. switch to metric system?

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Should U.S. switch to metric system?

One Democratic candidate says the U.S. should switch to the metric system. CNN's Tom Foreman reports.

Should U.S. switch to metric system?

One Democratic candidate says the U.S. should switch to the metric system. CNN's Tom Foreman reports.