Merrit Kennedy

The Trump administration says it will not make public the names of those visiting the White House, reversing the Obama administration's policy.

White House communications director Michael Dubke said in a statement that the decision was due to the "the grave national security risks and privacy concerns of the hundreds of thousands of visitors annually," NPR's Scott Horsley reports.

A Michigan emergency room doctor has been charged with performing female genital mutilation on multiple girls of about the age of seven.

After a series of "mishaps," the Navy says it will no longer allow sailors to bring electronic cigarettes onto its ships, submarines, aircraft, boats, craft and heavy equipment.

"The prohibition applies to Sailors, Marines, Military Sealift Command civilians and any personnel working on or visiting those units," according to a statement obtained by NPR's Sarah McCammon, issued by the commanders of the U.S. Fleet Forces and the U.S. Pacific Fleet.

Could there be life under the icy surface of Saturn's moon Enceladus?

Scientists have found a promising sign.

NASA announced on Thursday that its Cassini spacecraft mission to Saturn has gathered new evidence that there's a chemical reaction taking place under the moon's icy surface that could provide conditions for life. They described their findings in the journal Science.

Canada has taken a major step toward legalizing marijuana for recreational use.

Prime Minister Justin Trudeau's government introduced legislation that would allow adults to possess, share and purchase marijuana, while also strengthening penalties for those who give or sell the products to youth.

This law has been hotly anticipated, with pot producers and the medical community watching closely.

Boko Haram militants have used 27 children to carry out suicide bombing attacks in the first three months of this year in Nigeria, Chad, Niger and Cameroon, according to a new report from UNICEF.

This marks a major increase — 30 children were used in bombings for all of 2016 in those four countries, where Boko Haram is active.

UNICEF says 117 children have been used in suicide attacks since 2014. Eighty percent of them were girls.

Wondering how many kinds of trees there are? There's now a database that can answer that.

Scientists from the U.K.-based Botanic Gardens Conservation International say they have compiled the first-ever comprehensive list of all known tree species, totaling 60,065 different kinds.

Updated at 6:00 p.m. ET

Three explosions went off near the bus of Germany's Borussia Dortmund soccer team on Tuesday evening in the city of Dortmund, local police say.

The team said on Twitter that one of its players, defender Marc Bartra, suffered a broken wrist and is being treated in a hospital. The injury required surgery.

Amnesty International says there were fewer executions worldwide last year than the year before — but the number of death sentences handed down is the highest it has ever recorded.

In its annual report, Amnesty estimates that China carried out more executions than all the other countries put together. The human rights group says China put thousands of people to death. The exact figure is classified as a state secret and is not included in Amnesty's worldwide total.

North Korea is threatening "tough counteraction" after a U.S. Navy strike group was routed toward the Korean Peninsula following the rogue nation's continued ballistic missile and nuclear testing.

"We never beg for peace but we will take the toughest counteraction against the provocateurs in order to defend ourselves by powerful force of arms and keep to the road chosen by ourselves," the official Korean Central News Agency reported in English, quoting a Foreign Ministry official.

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