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The department formally announced a rule that explicitly bans the use of electronic cigarettes on commercial flights heading to or from the U.S. Previous guidance had led to some confusion.

The president is talking with the editor in chief of The Texas Tribune to open SXSW Interactive on March 11, and five days later, the first lady will deliver the keynote for SXSW Music.

Hillary Clinton and Donald Trump look to be on their way to securing the nominations of their respective parties because they won the most delegates on Super Tuesday. NPR explains the math and what it means for the rest of the presidential primary season.

The name of the game is delegates in presidential politics. The race for them is on in the 2016 primary elections. Here's how each candidate has done so far and what's at stake in each state.

Republicans say the NIH should switch funds from Ebola research to fighting Zika virusi, instead, but NIH officials balk. And a company prepares to test genetically engineered mosquitoes in Florida.

National security officials say one leader has been captured for interrogation. One official notes that sending Delta Force there "to do an in-person visit can be very helpful in getting information."

It's an effort to combat the damaging effects on kids from the city's lead-laced water. The effects of lead exposure are lifelong and can cause learning disabilities.

The Supreme Court on Wednesday heard what could be its most consequential abortion case in a generation. Hundreds of protesters crowded the steps of the building while arguments took place inside.

NPR's Kelly McEvers interviews Claudia Gazzini, Libya analyst for the International Crisis Group, about how ISIS gained a foothold there.

A new study finds that too little sleep boosts a signal in the body that may drive a stronger desire to eat. It's the latest evidence linking sleep deprivation to overeating and increased body weight.