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Mandalay Bay security guard Jesus Campos spoke for the first time publicly about his experience the night a gunman killed 58 people at a country music festival in Las Vegas. Campos, who was the first person to confront the killer, had remained largely out of the public eye.

The revelation that Republican Rep. Tom Marino of Pennsylvania — the White House nominee to head the National Office of Drug Control Policy — sponsored legislation that favored the drug industry while receiving campaign contributions from that same industry led to Marino withdrawing his name from consideration. Meanwhile, President Trump has announced that he will declare the opioid epidemic a national emergency.

Some 130 million years ago, when dinosaurs roamed Earth, two dead stars in a far-away galaxy collided violently, after spiraling around each other for millions of years.

The dead stars were neutron stars, exotic objects the size of Mount Everest and with the mass of the sun. Being this small and dense, the gravitational force is fierce. Someone once compared the pull of gravity near the surface of a neutron star to having all the population of Paris tied to your feet.

A year after a computer beat a human world champion in the ancient strategy game of Go, researchers say they have constructed an even stronger version of the program — one that can teach itself without the benefit of human knowledge.

The program, known as AlphaGo Zero, became a Go master in just three days by playing 4.9 million games against itself in quick succession.

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For people with diabetes, keeping blood sugar levels in a normal range – not too high or too low – is a lifelong challenge. New technologies to ease the burden are emerging rapidly, but insurance reimbursement challenges, supply shortages, and shifting competition make it tough for patients to access them quickly.

Jesus Campos, the Mandalay Bay security guard who was the first victim the night that Stephen Paddock rained bullets on people in Las Vegas, gave his first — and possibly last — media interview, to Ellen DeGeneres on The Ellen DeGeneres Show.

While there were no major revelations in the interview, which airs Wednesday, Campos' account added fresh detail to a timeline of events that law enforcement officials are still working to understand.

Chinese President Xi Jinping proclaimed the arrival of "a new era" in which a reinvigorated Communist Party will lead his nation to modernity, wealth and power as he opened the 19th national congress of China's ruling Communist Party on Wednesday.

The meeting is expected to give him a second five-year term.

Xi's speech, delivered in the cavernous Great Hall of the People overlooking Beijing's Tiananmen Square, lasted for 3 1/2 hours and traced the broad outlines of his vision and the party's policies.

Updated at 4:06 p.m. ET

A proposal in the Senate to help stabilize Affordable Care Act marketplaces would ensure that subsidies paid to insurance companies benefit consumers rather than padding the companies' profits.

This story was originally posted by member station KQED.

A bipartisan group of more than 140 of some of California's most powerful women — including lawmakers, lobbyists and consultants — are calling out pervasive sexual harassment in politics and across all industries, penning a public letter with one simple message: Enough.

Americans are divided along political lines — and by categories such as gender, age and education — on whether they think men have it easier than women today.

A new report by the Pew Research Center looks at views of changing gender roles in the United States among 4,573 adults interviewed in August and September.

Pez diablo: "devil fish." That's what locals in the Mexican state of Tabasco call the armored catfish that has invaded their waters.

Also known as suckermouths, the species is popular with aquarium owners because the fish eats the algae that pollute tanks. But in the wild, that same behavior erodes shorelines and devastates underwater plant life.

A Mexican social enterprise called Acari is trying to do something about it — by creating a taste for these aquatic terrors.

Updated at 11:10 a.m. ET

Gord Downie, singer of The Tragically Hip, died of complications from brain cancer Tuesday night at the age of 53. His death was announced in a statement from his family.

A federal judge in Maryland has blocked parts of President Trump's most recent attempt to impose broad limits on who can enter the U.S., granting a motion for a preliminary injunction that was filed by plaintiffs led by the International Refugee Assistance Project.

The plaintiffs "have established that they are likely to succeed on the merits," District Judge Theodore D. Chuang wrote in the Tuesday order dealing another setback to the Trump administration's attempt to ban travel to the U.S. by citizens of certain countries.

One thing you can say about Rimas Meleshyus: He's definitely persistent.

"I'm a very determined person," he told the Whidbey News-Times in 2015. "I'm very strong."

Meleshyus, who is in his mid-60s, departed Hilo, Hawaii, aboard his 30-foot sailboat Mimsy in June and was rescued a few days ago off Saipan, a U.S. territory north of Guam.

Well now you think of love as sitting on a mountain. Think of it as being a great big rock. Won't you think before you started to roll it down. Because once you start it, you can't make it stop.

Grammy Award-winning blues guitarist Robert Cray returns to the Mountain Stage with a take on Bill Withers' "The Same Love that Made Me Laugh" that's sure to stir our soul. 

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In late August, Hurricane Harvey brought record rainfall to Houston. In mid-October, the city's two large federal reservoirs have finally been emptied of the massive amount of water that had filled each of them to the brim.

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Democratic and Republican senators say they are ready to undo President Trump's undoing of a part of the Affordable Care Act.

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If you've ever put in eyedrops, some of them have almost certainly spilled onto your eyelid or cheek.

The good news is the mess doesn't necessarily mean you missed. The bad news is that medicine you wiped off your face is wasted by design — and it's well-known to the drug companies that make the drops.

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