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Nigeria is on the verge of being polio-free. And that would mean that for the first time ever there's no ongoing polio transmission on the African continent.

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Copyright 2015 NPR. To see more, visit http://www.npr.org/.

When I set out to interview Helena Hicks, I thought we'd talk history. The soft-spoken, 80-year-old who stands just 4 feet 10 inches tall with a sleek, silver bob, is known for her role in helping to desegregate Read's Drug Store chain. But it turns out she's as active as ever, a force to reckon with at any sense of injustice.

"My father taught me that 'you are somebody,' " she says. "If it's wrong, you do something about it."

The 2015 NBA Draft took place Thursday night in Brooklyn's Barclay Center. Karl-Anthony Towns from the University of Kentucky was the first pick, drafted by the Minnesota Timberwolves, a team that ended last season with a 16-66 record. Nineteen-year-old, 6-foot-11 Towns only played one year at Kentucky, but during that season was named a 2015 Second-Team All-American. He also helped lead Kentucky to the Final Four.

In an interview shortly after his pick, Towns told ESPN, "This is what you live for." He continued, "I'm coming with a winning attitude. I just want to win."

The U.S. Supreme Court handed the Obama administration a sweeping victory on Thursday, upholding the nationwide subsidies that are crucial to the president's health care law. By a 6-3 vote, the high court ruled that Congress meant all three major provisions of the law to apply to all states and to work in tandem.

The ruling was the court's second decision upholding the Affordable Care Act — three years ago, it upheld the law as constitutional.

There were plenty of tasty tidbits packed into the Dietary Guidelines Advisory Committee report that came out back in February.

As we reported, the panel of nutrition experts that wrote the report said it was OK to eat an egg a day. The scientific evidence now shows it won't raise the amount of LDL cholesterol – the bad kind of cholesterol — in your blood or raise the risk of heart disease.

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Copyright 2015 NPR. To see more, visit http://www.npr.org/.

PBS has released details about an internal investigation that found that actor Ben Affleck exerted improper influence by requesting that the show Finding Your Roots hide details of a slave-owning ancestor in his family tree.

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Copyright 2015 NPR. To see more, visit http://www.npr.org/.

Copyright 2015 NPR. To see more, visit http://www.npr.org/.

Copyright 2015 NPR. To see more, visit http://www.npr.org/.

Copyright 2015 NPR. To see more, visit http://www.npr.org/.

Copyright 2015 NPR. To see more, visit http://www.npr.org/.

Copyright 2015 NPR. To see more, visit http://www.npr.org/.

The controversial bill that would require almost all children entering day care or school in California to be vaccinated crossed another key hurdle Thursday, as the state Assembly approved it by a vote of 46-30.

The bill, SB 277, now returns to the state Senate, where lawmakers will be asked to concur with amendments made in the Assembly.

The California Assembly has joined the state Senate in voting to approve a controversial bill requiring all children attending school to be vaccinated against measles and other common, preventable illnesses — effectively eliminating so-called "personal belief exemptions" that allowed parents to opt out.

In 1922, seven Western states — Colorado, Utah, New Mexico, Arizona, Nevada, Wyoming and California — drew up an agreement on how to divide the waters of the Colorado River. But there was one big problem with the plan: They overestimated how much water the river could provide.

As a result, each state was promised more water than actually exists. This miscalculation — and the subsequent mismanagement of water resources in those states — has created a water crisis that now affects nearly 40 million Americans.

This post was updated at 7:34 pm ET to reflect comment from Christie.

Once a smoker always a smoker, right? Not quite.

As the number of smokers drops, the remaining smokers actually smoke less and are more likely to quit, according to a study published Wednesday in the journal Tobacco Control.

Updated at 1:25 p.m. ET

President Obama, commenting on the U.S. Supreme Court's ruling today to uphold a key provision of his signature health care law, said after numerous challenges, the Affordable Care Act has been "woven into the fabric of America" and "is here to stay."

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