Eyder Peralta

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Gwen Ifill, one of the most prominent political journalists in the country, has died, according to PBS. She was 61.

The Chan Zuckerberg Initiative just announced one of its biggest investments to date: It is ponying up more than $3 billion to kickstart "Chan Zuckerberg Science," an initiative that plans to bring together multidisciplinary teams of scientists in an effort to prevent, cure or manage "all diseases in our children's lifetime."

The Consumer Product Safety Commission issued a formal recall of 1 million Samsung Galaxy Note 7 smartphones on Thursday.

During a press conference, Chairman Elliot Kaye said consumers should "take advantage of this recall right away" because the phone represents such a "serious fire hazard."

Kaye said consumers should check the identifying number on the back of the phone at Samsung.com to determine whether their phone has a defective battery.

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Demanding action on gun control, about 30 Democratic members of the United States House of Representatives are staging a sit-in.

"Lawmakers are grouped in the well of the chamber, in front of the speaker's dais and in chairs in the front row," NPR's Sue Davis reports. "Some members are literally sitting on the floor of the House."

The Federal Aviation Administration issued the first operational rules to govern the commercial use of drones on Tuesday.

Transportation Secretary Anthony Foxx said this was a "huge step for innovation."

The 600-plus pages of new regulations require drone operators to pass a written exam every two years, keep the unmanned aircraft within sight and avoid flying it over people and at night. The rules also require drones to stay at least 5 miles from airports.

During her tenure as secretary of state, Hillary Clinton violated department policies when she used a personal email account to conduct official business, a new report from the Office of the Inspector General for the State Department found.

The report, which was obtained by NPR's Susan Davis ahead of its public release, reads:

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