Marc Short, the top aide to Vice President Pence, entered quarantine after testing positive on Saturday, Pence's office said. Pence, who tested negative, will continue his busy campaign travel.

(Image credit: Al Drago/Bloomberg via Getty Images)

The study is based on some assumptions under different scenarios. It suggests that if 95% of Americans wore masks in public it could drastically reduce the amount of COVID-19 deaths by February.

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Most of the federal contracts with companies involved in the crash program to make COVID-19 vaccines haven't been made public. The lack of disclosure raises questions about accountability.

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Walker was a pioneer in Austin's country music scene in the 1970s. His most famous song, "Mr. Bojangles," went on to inspire countless covers.

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The approach the two candidates are taking in this final leg of the campaign mirrors the divergent narratives they're trying to convey about the pandemic and the choice voters face this fall.

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Afghanistan's interior ministry said at least 57 others were wounded in the bombing outside of an education center in a heavily Shiite neighborhood in Kabul.

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President Andrzej Duda, who says he's experiencing no symptoms, will self-isolate. Duda has apologized to those he came into contact with, who will need to go into quarantine.

(Image credit: Mateusz Slodkowski/AFP via Getty Images)

The president cast his ballot from his adopted home state before departing for rallies on Saturday in North Carolina, Ohio and Wisconsin. More than 50 million Americans have already voted.

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Plus: An Among Us spam attack, China's favorite vulnerabilities, and more of the week's top security news.

In the digital arms race with China, the only thing worse than fearing AI itself is the fear of not having it at all.

Motorola's Moto Mods failed to pull off a long-lasting smartphone trend. But Apple's MagSafe series looks like it might actually stick.

After mass protests, and amid a pandemic, Chileans go to the polls Sunday for a referendum over whether to scrap the constitution introduced under Gen. Augusto Pinochet's rule.

(Image credit: Esteban Felix/AP)

The only thing better than buying a new bicycle is keeping it. We tested a bunch of bike locks and these are our picks—and some advice for using them.

Normally, the 'birthplace of ice' freezes by late October. For the first time in recorded history, it hasn't. That could have knock-on effects across the Arctic.

NPR's Scott Simon talks to reporter Cindy Carcamo about the 545 migrant children in the US who were separated from their families and whose parents cannot now be located.

In a deal brokered by the White House, Sudan has agreed to normalize ties with Israel. It's a big step for a country that has long been bitterly opposed to Israel.

The University of Texas band plans to boycott today's football game against Baylor. The song the Longhorn band usually plays, Eyes OF Texas, has racist roots that are fracturing the campus.

Entomologists in Washington State have located the first ever nest of the Asian giant hornet in the U.S. They tracked the "murder hornet" to its nest by attaching it with a miniature radio tracker.

Cell phone data shows that contract workers who work at multiple nursing homes helped transmit the coronavirus between facilities.

About a third of Latino voters view Trump favorably and it breaks down a long gender lines. More Latino men support the president, citing his economic policies and his tough guy approach.