New science shows Gulf spill is still killing dolphins

Aired: 5/20/2015 | 0:05:01 | Clip
More than 1,000 bottlenose dolphins have died off the Gulf Coast since 2010, the year a massive Deepwater Horizon spill spewed millions of gallons of oil and chemicals. A new study by researchers at the National Oceanic and Atmospheric Administration examines why. The NewsHour’s William Brangham joins Judy Woodruff to discuss the findings.

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