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Recreational drug users recruited for clinical abuse trials

Recreational drug users recruited for clinical abuse trials

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3:18
What to expect from Obama’s climate change plan

What to expect from Obama’s climate change plan

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3:41
Are Mideast allies buying into the Iran deal?

Are Mideast allies buying into the Iran deal?

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9:43
Will new clean power regulations stand up to challenges?

Will new clean power regulations stand up to challenges?

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15:43
Sudanese military bombs don't spare civilians, aid workers

Sudanese military bombs don't spare civilians, aid workers

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7:45
How much does the first GOP presidential debate matter?

How much does the first GOP presidential debate matter?

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7:58
Ben Carson talks ‘all lives matter,’ immigration reform

Ben Carson talks ‘all lives matter,’ immigration reform

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7:42
What caused the dramatic tipping point in deadly shootings?

What caused the dramatic tipping point in deadly shootings?

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8:45
Why Hungary is building a new 'Iron Curtain'

Why Hungary is building a new 'Iron Curtain'

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9:30
Cracking down on the shellfish black market

Cracking down on the shellfish black market

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7:35
New documentary offers close-up view of violent cartels

New documentary offers close-up view of violent cartels

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4:35
CDC offers new call to arms on nightmare bacteria

CDC offers new call to arms on nightmare bacteria

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5:55
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PBS News Hour

How long-lasting is promising Ebola vaccine protection?

A clinical trial in Guinea found that an experimental vaccine was 75 to 100 percent effective in blocking new infections of the Ebola virus. Hari Sreenivasan speaks to Dr. Anthony Fauci of the National Institutes of Health about the vaccine.