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Federal aviation regulators issued a new round of safety fixes for Boeing's beleaguered 737 Max jetliners, mandating repairs to sections of the planes that could make them vulnerable to lightning strikes and other activity which might result in engine malfunction.

The proposed fix issued by the Federal Aviation Administration on Tuesday said certain panels on the planes, including the metallic layer that serves as part of the shielding for aircraft wiring, is susceptible to potential "electromagnetic effects of lightning strikes or high intensity radiated fields."

Stocks fell sharply for a second day in a row. The Dow dropped 879 points on Tuesday, after tumbling more than 1,000 points on Monday.

While the coronavirus outbreak in China appears to have peaked, investors are worried by the growing number of cases in other countries, as well as a warning from U.S. health officials that the virus could hit closer to home.

Just last week, the S&P 500 stock index was hitting record highs. Now it's fallen more than 6% in just the last two days.

Irresponsibility — by carmaker Tesla and by a Tesla driver — contributed to a deadly crash in California in 2018, federal investigators say.

The driver appears to have been playing a game on a smartphone immediately before his semi-autonomous 2017 Model X accelerated into a concrete barrier. Distracted by his phone, he did not intervene to steer his car back toward safety and was killed in the fiery wreck.

But Tesla should have anticipated that drivers would misuse its "autopilot" feature like this and should build in more safeguards to prevent deadly crashes.

Updated at 4:50 p.m. ET

Federal health officials issued a blunt message Tuesday: Americans need to start preparing now for the possibility that more aggressive, disruptive measures might be needed to stop the spread of the new coronavirus in the U.S.

The strongly worded warning came in response to outbreaks of the virus outside China, including in Iran, Japan, South Korea and Italy, which officials say have raised the likelihood of outbreaks occurring stateside.

The humanitarian crisis in Syria has reached a "horrifying new level," according to a U.N. official.

That's how Mark Lowcock, the United Nations undersecretary for humanitarian affairs and emergency relief coordinator, described conditions in northwest Syria based on eyewitness accounts from U.N. staff in and around Idlib province in northwest Syria.

In the second installment of our series on truth, we dive into the science behind truth. How do we define it, how do our brains process it and why do we fight over it?

Guests

Jay Van Bavel, associate professor of psychology and neural science at NYU. Director of the Social Identity and Morality Lab. (@jayvanbavel)

Deep in the third quarter against Stanford, Oregon guard Sabrina Ionescu picked up a defensive rebound.

It was a big one: With that play, Ionescu became the first NCAA basketball player, male or female, to reach the milestone of 2,000 points, 1,000 rebounds and 1,000 assists in a career.

To say there is a lot of hype around 5G is probably an understatement. Verizon and T-Mobile spent an estimated $22 million on Super Bowl ads to tell us all about it.

In one commercial, Verizon said it would allow firefighters to see through smoke and doctors to communicate with ambulances in real time. Actor Anthony Anderson touted the supremacy of T-Mobile's 5G network to his mother, who ground-truths the matter by going from the pie shop to the park to ultimately the club.

Victor Yu is not one of the more than 2,500 people who the Chinese government says were killed by the coronavirus. The 47-year-old resident of Wuhan, epicenter of the outbreak, died Feb. 19 from complications related to renal carcinoma, a common type of kidney cancer. But his family believes that his untimely death is likely related to the coronavirus outbreak.

Everyone who lived through Black Saturday remembers the heat and the wind that day in February 2009. The temperature soared to 115 degrees Fahrenheit — so hot it sucked the breath out of you, made your vision swim and your fingers swell. The wind blew in from the northwest, from the vast, arid Australian interior. Flags flew stiff. Fire danger was extreme.

President Trump criticized remarks by Justices Sonia Sotomayor and Ruth Bader Ginsburg as "inappropriate" and said the Supreme Court justices should recuse themselves from cases involving the president.

"I just don't know how they cannot recuse themselves for anything Trump or Trump related," Trump said Tuesday in a wide-ranging news conference in New Delhi.

"What Justice Sotomayor said yesterday was highly inappropriate," Trump added. "She's trying to shame people with perhaps a different view into voting her way."

Updated at 11:40 a.m. ET

A well-known Hong Kong bookseller who published critical and sometimes titillating volumes about Chinese leaders and who disappeared in China more than two years ago has been quietly sentenced to a decade in prison for passing on intelligence to people overseas.

Updated at 8:45 a.m. ET

Former Egyptian President Hosni Mubarak, who was ousted from power in the early days of the Arab Spring, has died at the age of 91.

Egypt's government has announced three days of public mourning for Mubarak, who is to be buried in a military funeral.

A statement from the Egyptian presidency said it "mourns with great sorrow" Mubarak's death in light of his role as a hero of the 1973 Arab-Israeli War, which it said "restored dignity and pride" among Arab nations.

Days before the South Carolina primary, seven Democratic candidates will face off in a debate in Charleston, S.C.

The debate comes after Sen. Bernie Sanders handily won the Nevada caucuses, won in New Hampshire and tied in Iowa.

Here's what you need to know:

When is the South Carolina Democratic debate? Tuesday, from 8 to 10 p.m. ET.

Where is the debate being held? Charleston.

What channel is the debate on? CBS and streaming online on CBSN.

It's recreation time at a Los Angeles County jail known as the Twin Towers. Nearly a dozen disheveled young men stand docilely as they munch on sandwiches out of brown paper bags.

They're half-naked except for sleeveless, thick, blanket-like restraints wrapped around them like medieval garments.

All are chained and handcuffed to shiny metal tables bolted to the floor.

"It's lunchtime and they're actually [in] programming right now," says a veteran guard, LA County Sheriff's Deputy Myron Trimble.

Amy Berman Jackson has worked in the Washington, D.C., legal world for more than 30 years — as a federal prosecutor, white collar defense attorney and now district court judge.

But it is her current work presiding over several prosecutions stemming from the Russia investigation, including the case against President Trump's longtime friend and informal adviser, Roger Stone, that have put Jackson in the public spotlight on the national stage.

Attorney General William Barr is scheduled to travel down Pennsylvania Avenue on Tuesday to make what could be a very difficult sales pitch to Senate Republicans.

Provisions in the Foreign Intelligence Surveillance Act are set to expire next month, and Barr is expected to try to persuade senators to vote to reauthorize them.

Criticism of FISA is now mainstream among many Republicans and some Democrats after a thorny subplot from the Russia investigation.

Kenichi Wiegardt can really shuck oysters. His hands work at a dizzying pace opening the shells, a rhythmic thump, thump, crack, slice. Then oyster meat blurps into a strainer over and over.

Wiegardt, a fifth-generation oysterman, makes his living in the mud of Willapa Bay on Washington's coast.

"This time of year we should be shucking 40 to 45 hours a week, and we're down to 15 to 18 hours," Wiegardt says.

Major League Baseball's opening day is a little more than a month off. But one of the boys of summer has been cross-training in the off season — by roping cattle. Professionally. Under an alias.

Madison Bumgarner, the left-handed pitching ace who was 2014 World Series MVP with the San Francisco Giants, has been entering — and sometimes winning — rodeo events under the name Mason Saunders.

Craigslist is a bit of an anomaly on the rapidly changing Internet. While other sites are constantly tweaking, testing new designs, finding new ways to gather data, Craigslist is remarkable for its stability.

A typical city's page looks roughly the same today as it did 15 years ago.

Despite worrisome new outbreaks in Iran, Italy and South Korea, the coronavirus disease called COVID-19 is not currently a pandemic, the World Health Organization said today.

In fact, there are some encouraging trends, especially in Hubei province, where most of the cases have been reported.

The epidemic there appears to have plateaued in late January and is continuing on a good trajectory. Dr. Bruce Aylward led a WHO trip to China with a scientific delegation that just concluded. On Sunday, he told reporters in Beijing that trend is real.

Some rural Oregonians are so frustrated by Democratic politics they want to leave the state.

But not by moving elsewhere.

Instead, a group is seeking to change the map itself, so that most of Oregon and a chunk of Northern California would break off and join Idaho, a Republican-majority state. "Move Oregon's Border For a Greater Idaho" succeeded in getting petitions approved for circulation in two rural Oregon counties this month.

This series is produced in collaboration with The Conversation. 

We kickoff our series on truth – how we use it, how we abuse it, what it means and what it’s worth to us.

Beth Daley, editor and general manager of The Conversation U.S. (@BethBDaley)

South Korea's government says it is in a critical struggle to contain the spread of the COVID-19 virus from the disease's epicenter in Daegu. It has given itself four weeks to stabilize the situation in the city of 2.5 million, some 150 miles southeast of the capital, Seoul.

"If authorities fail to contain the spread of the COVID-19 in Daegu, there is a high possibility that COVID-19 could spread nationwide," Vice Health Minister Kim Gang-lip told reporters on Monday.

The extradition hearing for WikiLeaks co-founder Julian Assange began Monday in London — the latest turn in the legal saga of perhaps the world's most famous secret-spiller.

Updated 5:17 p.m. ET

Some 20,000 mourners packed the Staples Center in Los Angeles on Monday for the public memorial honoring legendary former NBA player Kobe Bryant and his daughter Gianna, who were killed along with seven other people in a helicopter crash last month.

The star-studded ceremony opened with a powerful performance by Beyoncé singing her song "XO" which she said was one of Bryant's favorite songs and includes the lyrics: "In the darkest hour / I'll search through the crowd / Your face is all I can see / I'll give you everything."