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With Afghanistan decision, what happens now for U.S. troops?

With Afghanistan decision, what happens now for U.S. troops?

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How ISIS makes more than a million dollars a day

How ISIS makes more than a million dollars a day

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Why Kentucky agriculture is banking on hemp

Why Kentucky agriculture is banking on hemp

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How deepening the Panama Canal set off a debate in Florida

How deepening the Panama Canal set off a debate in Florida

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U.S. sending troops to Cameroon to monitor Boko Haram

U.S. sending troops to Cameroon to monitor Boko Haram

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Shields and Brooks on campaign finance and debate season

Shields and Brooks on campaign finance and debate season

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Yo-Yo Ma plays 'Louange à l'éternité de Jésus'

Yo-Yo Ma plays 'Louange à l'éternité de Jésus'

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Journalist Mohamed Fahmy on his time in an Egyptian prison

Journalist Mohamed Fahmy on his time in an Egyptian prison

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In Copenhagen, an ambassador who is also a reality TV star

In Copenhagen, an ambassador who is also a reality TV star

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New imagery from Pompeii reveals surprising discoveries

New imagery from Pompeii reveals surprising discoveries

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Can a pilot program keep prisoners from going back to jail?

Can a pilot program keep prisoners from going back to jail?

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If you can wager on them, are fantasy sports gambling?

If you can wager on them, are fantasy sports gambling?

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2:15
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PBS News Hour

Do we overestimate how much sleep we need?

By studying the habits of three hunter-gatherer groups who live much the way humans have for thousands of years, a team of scientists is challenging conventional wisdom about how much sleep we need. Hari Sreenivasan goes to UCLA to learn more about getting enough rest and to do something he's never done on assignment before: falling asleep while on the job.
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