keep its borders closed for another year. Japan is currently barring almost all nonresidents from entering the country, and intense scrutiny of overseas arrivals in China has left multinational businesses without key workers.

The immediate future for many places in Asia seems likely to be defined by frantic optimization.

China’s response to the outbreak in Guangzhou — testing millions of people in days, shutting down entire neighborhoods — is a rapid-fire reprise of how it has handled previous flare-ups. Few inside the country expect this approach to change anytime soon, especially as the Delta variant, which has devastated India, is now beginning to circulate.

has threatened residents with fines of around $450 for refusing vaccines. Vietnam has responded to its recent spike in infections by asking the public for donations to a Covid-19 vaccine fund. And in Hong Kong, officials and business leaders are offering a range of inducements to ease severe vaccine hesitancy.

Nonetheless, the prognosis for much of Asia this year is billboard obvious: The disease is not defeated, and won’t be anytime soon. Even those lucky enough to get a vaccine often leave with mixed emotions.

“This is the way out of the pandemic,” said Kate Tebbutt, 41, a lawyer who last week had just received her first shot of the Pfizer vaccine at the Royal Exhibition Building near Melbourne’s central business district. “I think we should be further ahead than where we are.”

Reporting was contributed by Raymond Zhong in Taipei, Taiwan, Ben Dooley in Tokyo, Sui-Lee Wee in Singapore, Youmi Kim in Seoul and Yan Zhuang in Melbourne, Australia.

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Associated Press Begins Review of Social Media Policy After Emily Wilder Firing

The Associated Press has started a review of its social media policy after more than 150 staff members publicly condemned the firing of a young journalist for violating that policy.

In a memo to its global newsrooms on Monday, The A.P.’s top editors said they had heard the concerns from many journalists over the weekend and were “committed to expanding the conversation taking place about A.P.’s approach to social media.”

The news agency faced a backlash after Emily Wilder, a 22-year-old news associate who had joined the company in Arizona, was dismissed on May 19, three weeks after she was hired.

Ms. Wilder, who graduated from Stanford University in 2020 and had worked at The Arizona Republic, said in a statement on Friday that she had been the subject of a campaign by Stanford College Republicans, whose social media posts drew attention to her pro-Palestine activism at the university. She added that her editors had reassured her she would not be fired for her past advocacy work.

one tweet, she said that “using ‘israel’ but never ‘palestine,’ or ‘war’ but not ‘siege and occupation’ are political choices — yet media make those exact choices all the time without being flagged as biased.”

Dozens of A.P. journalists signed an open letter after Ms. Wilder’s firing, criticizing the news agency and asking for clarification on how she had violated the company’s social media policy.

“The lack of clarity on the violations of the social media policy has made A.P. journalists afraid to engage on social media — often critical to our jobs — in any capacity,” the letter said.

Ten newsroom leaders responded Monday in a memo to the staff announcing a plan to review its guidelines. They said that formal groups would discuss ideas and make recommendations, and a committee of staff members would review the recommendations by Sept. 1. Any changes to the policy would then be raised in the next round of contract negotiations with the union that represents A.P. employees, the News Media Guild.

“One of the issues brought forward in recent days is the belief that restrictions on social media prevent you from being your true self, and that this disproportionately harms journalists of color, L.G.B.T.Q. journalists and others who often feel attacked online,” the memo said.

The editors said in the note that “much of the coverage” of Ms. Wilder’s dismissal “does not accurately portray a difficult decision that we did not make lightly.”

Lauren Easton, a spokeswoman for The A.P., said the company generally refrained from commenting on personnel, but confirmed that Ms. Wilder was dismissed for violating the social media policy.

“We understand that other news organizations may not have made the same decision,” she said. “While many news organizations offer points of view, opinion columnists and editorials, A.P. does not. We don’t express opinion. Our bedrock is fact-based, unbiased reporting.”

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More Scientists Urge Broad Inquiry Into Coronavirus Origins

A group of 18 scientists stated Thursday in a letter published in the journal Science that there is not enough evidence to decide whether a natural origin or an accidental laboratory leak caused the Covid-19 pandemic.

They argued, as the U.S. government and other countries have, for a new investigation to explore where the virus came from.

The organizers of the letter, Jesse Bloom, who studies the evolution of viruses at the Fred Hutchinson Cancer Research Center in Seattle, and David Relman, a microbiologist at Stanford University, said they strove to articulate a wait-and-see viewpoint that they believe is shared by many scientists. Many of the signers have not spoken out before.

“Most of the discussion you hear about SARS-CoV-2 origins at this point is coming from, I think, the relatively small number of people who feel very certain about their views,” Dr. Bloom said.

issued a report claiming that such a leak was extremely unlikely, even though the mission never investigated any Chinese labs. The team did visit the Wuhan lab, but did not investigate it. A lab investigation was never part of their mandate. The report, produced in a mission with Chinese scientists, drew extensive criticism from the U.S. government and others that the Chinese government had not cooperated fully and had limited the international scientists’ access to information.

The new letter argued for a new and more rigorous investigation of virus origins that would involve a broader range of experts and safeguard against conflicts of interest.

Recent letters by another group of scientists and international affairs experts argued at length for the relative likelihood of a laboratory leak. Previous statements from other scientists and the W.H.O. report both asserted that a natural origin was by far the most plausible.

Michael Worobey, an evolutionary biologist at the University of Arizona, said he signed the new letter because “the recent W.H.O. report on the origins of the virus, and its discussion, spurred several of us to get in touch with each other and talk about our shared desire for dispassionate investigation of the origins of the virus.”

“I certainly respect the opinion of others who may disagree with what we’ve said in the letter, but I felt I had no choice but to put my concerns out there,” he said.

Another signer, Sarah E. Cobey, an epidemiologist and evolutionary biologist at the University of Chicago, said, “I think it is more likely than not that SARS-CoV-2 emerged from an animal reservoir rather than a lab.”

But “lab accidents do happen and can have disastrous consequences,” she added. “I am concerned about the short- and long-term consequences of failing to evaluate the possibility of laboratory escape in a rigorous way. It would be a troublesome precedent.”

The list of signers includes researchers with deep knowledge of the SARS family of viruses, such as Ralph Baric at the University of North Carolina, who had collaborated with the Chinese virologist Shi Zhengli in research done at the university on the original SARS virus. Dr. Baric did not respond to attempts to reach him by email and telephone.

often cited paper in March 2020 that dismissed the likelihood of a laboratory origin based largely on the genome of the SARS-CoV-2 virus that causes Covid-19. “We do not believe any type of laboratory-based scenario is plausible,” that paper stated.

Speaking for himself only, Dr. Relman said in an interview that “the piece that Kristian Anderson and four others wrote last March in my view simply fails to provide evidence to support their conclusions.”

Dr. Andersen, who reviewed the letter in Science, said that both explanations were theoretically possible. But, “the letter suggests a false equivalence between the lab escape and natural origin scenarios,” he said. “To this day, no credible evidence has been presented to support the lab leak hypothesis, which remains grounded in speculation.”

Instead, he said, available data “are consistent with a natural emergence of a novel virus from a zoonotic reservoir, as has been observed so many times in the past.” He said he supported further inquiry into the origin of the virus.

Angela Rasmussen, a virologist at University of Saskatchewan’s Vaccine and Infectious Disease Organization, has criticized the politicization of the laboratory leak theory.

She supports further investigation, but said that “there is more evidence (both genomic and historical precedent) that this was the result of zoonotic emergence rather than a laboratory accident.”

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C.D.C. Advisers Endorse Pfizer Vaccine for Children Ages 12 to 15

The federal government on Wednesday took a final step toward making the Pfizer-BioNTech coronavirus vaccine available to adolescents in the United States, removing an obstacle to school reopenings and cheering millions of families weary of pandemic restrictions.

An advisory committee to the Centers for Disease Control and Prevention voted to recommend the vaccine for use in children ages 12 to 15. The C.D.C. director, Dr. Rochelle Walensky, is expected to review the recommendations and approve them later on Wednesday.

“Approving Covid-19 vaccines for children 12 to 15 years of age is an important step in removing barriers for vaccinating children of all ages,” said Dr. Yvonne Maldonado, who represents the American Academy of Pediatrics on the federal Advisory Committee on Immunization Practices.

Many parents are eagerly anticipating the availability of vaccines for children, at least in part to speed their return to schools. Roughly one-third of eighth graders, usually 13 or 14 years old, are still learning fully remotely.

at least as effective in 12- to 15-year-olds as it has been in older teenagers and adults. Apart from a slight increase in the frequency of fevers, the shots also seemed to have comparable, mostly negligible side effects.

The company plans to continue monitoring trial participants for two years after the second dose to assess the vaccine’s long-term safety and efficacy.

The Food and Drug Administration reviewed the clinical data and on Monday authorized the Pfizer vaccine for use in these children, capping weeks of anticipation from parents and children about a swifter return to normalcy.

“While it’s true that children are generally spared from severe disease, the fact that they’ve been unable to be vaccinated has caused major disruptions in their lives that have real developmental consequences,” said Dr. Amesh Adalja, a senior scholar at the Johns Hopkins Center for Health Security. “Vaccination of this age cohort will allow these children to more fully return to their normal lives.”

about 20,000 pharmacies nationwide are expected to offer the vaccine for free to these children.

survey by the Kaiser Family Foundation.

Some of those parents may change their minds, as other children safely receive vaccines and resume in-person schooling, or rejoin team sports like football and basketball that involve close contact, the researchers suggested.

Others may wait until they must comply with school requirements. Public schools in all 50 states require certain vaccines, but officials may not be able to enforce compliance until the Pfizer-BioNTech vaccine gains the F.D.A.’s full approval.

The vaccine has emergency authorization now. Pfizer has applied to the F.D.A. for full approval, but that process is expected to take several months. Even after approval, students may still opt out by citing medical reasons or religious beliefs.

State and local leaders will need to make particular efforts to reach children in low-income families or in communities of color. Black and Hispanic adults have among the lowest rates of vaccination: As of May 3, just 25 percent of Black people and 27 percent of Hispanic people had been inoculated, compared with 39 percent of white people.

Making the vaccine accessible to these communities will require easier transportation and storage of doses. The Pfizer-BioNTech vaccine can be stored for only five days in standard refrigerators. The companies are planning to ship smaller packs for use in doctors’ offices, and are developing a formulation that can be refrigerated for up to 10 weeks.

Pfizer and BioNTech plan in September to submit requests for authorization of the vaccine in children ages 2 to 11.

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Seeing the Real Faces of Silicon Valley

Mary Beth Meehan and

Mary Beth Meehan is an independent photographer and writer. Fred Turner is a professor of communication at Stanford University.


The workers of Silicon Valley rarely look like the men idealized in its lore. They are sometimes heavier, sometimes older, often female, often darker skinned. Many migrated from elsewhere. And most earn far less than Mark Zuckerberg or Tim Cook.

This is a place of divides.

As the valley’s tech companies have driven the American economy since the Great Recession, the region has remained one of the most unequal in the United States.

During the depths of the pandemic, four in 10 families in the area with children could not be sure that they would have enough to eat on any given day, according to an analysis by the Silicon Valley Institute for Regional Studies. Just months later, Elon Musk, the chief executive of Tesla, who recently added “Technoking” to his title, briefly became the world’s richest man. The median home price in Santa Clara County — home to Apple and Alphabet — is now $1.4 million, according to the California Association of Realtors.

For those who have not been fortunate enough to make billionaire lists, for midlevel engineers and food truck workers and longtime residents, the valley has become increasingly inhospitable, testing their resilience and resolve.

Seeing Silicon Valley,” from which this photo essay is excerpted.

it would give $1 billion in loans, grants and land toward creating more affordable housing in the area. Of that pledge, $25 million would go toward building housing for educators: 120 apartments, including for Konstance and the other teachers in the original pilot as long as they were working in nearby schools.

At the time of the announcement, Facebook said the money would be used over the next decade. Construction on the teacher housing has yet to be completed.

One day Geraldine received a phone call from a friend: “They’re taking our churches!” her friend said. It was 2015, when Facebook was expanding in the Menlo Park neighborhood where she lived. Her father-in-law had established a tiny church here 55 years before, and Geraldine, a church leader, couldn’t let it be torn down. The City Council was holding a meeting for the community that night. “So I went to the meeting,” she said. “You had to write your name on a paper to be heard, so I did that. They called my name and I went up there bravely, and I talked.”

Geraldine doesn’t remember exactly what she said, but she stood up and prayed — and, ultimately, the congregation was able to keep the church. “God really did it,” she said. “I didn’t have nothing to do with that. It was God.”

In 2016, Gee and Virginia bought a five-bedroom house in Los Gatos, a pricey town nestled beside coastal foothills. Houses on their street cost just under $2 million at the time, and theirs was big enough for each of their two children to have a bedroom and for their parents to visit them from Taiwan.

Together, the couple earn about $350,000 a year — more than six times the national household average. Virginia works in the finance department of Hewlett-Packard in Palo Alto, and Gee was an early employee of a start-up that developed an online auctioning app.

They have wanted to buy nice furniture for the house, but between their mortgage and child care expenses, they don’t think they can afford to buy it all at once. Some of their rooms now sit empty. Gee said that Silicon Valley salaries like theirs sounded like real wealth to the rest of the country, but that here it didn’t always feel that way.

Jon lives in East Palo Alto, a traditionally lower-income area separated from the rest of Silicon Valley by Highway 101.

By the time Jon was in the eighth grade he knew he wanted to go to college, and he was accepted by a rigorous private high school for low-income children. He discovered an aptitude for computers, and excelled in school and professional internships. Yet as he advanced in his career, he realized that wherever he went there were very few people who looked like him.

“I got really troubled,” he said. “I didn’t know who to talk to, and I saw that it wasn’t a problem for them. I was just like ‘I need to do something about this.’”

Jon, now in his 30s, has come back to East Palo Alto, where he has developed maker spaces and brought tech-related education projects to members of the community.

“It is amazing living here,” said Erfan, who moved to Mountain View when her husband got a job as an engineer at Google. “But it’s not a place I want to spend my whole life. There are lots of opportunities for work, but it’s all about the technology, the speed for new technology, new ideas, new everything.” The couple had previously lived in Canada after emigrating from Iran.

“We never had these opportunities back home, in Iran. I know that — I don’t want to complain,” she added. “When I tell people I’m living in the Bay Area, they say: ‘You’re so lucky — it must be like heaven! You must be so rich.’”

But the emotional toll can be weighty. “We are sometimes happy, but also very anxious, very stressed. You have to be worried if you lose your job, because the cost of living is very high, and it’s very competitive. It’s not that easy — come here, live in California, become a millionaire. It’s not that simple. ”

Elizabeth studied at Stanford and works as a security guard for a major tech firm in the area. She is also homeless.

Sitting on a panel about the issue at San Jose State University in 2017, she said, “Please remember that many of the homeless — and there are many more of us than are captured in the census — work in the same companies that you do.” (She declined to disclose which company she worked for out of fear of reprisal.)

While sometimes homeless co-workers may often serve food in cafeterias or clean buildings, she added, many times they’re white-collar professionals.

“Sometimes it takes only one mistake, one financial mistake, sometimes it takes just one medical catastrophe. Sometimes it takes one tiny little lapse in insurance — it can be a number of things. But the fact is that there’s lots of middle-class people that fell into poverty very recently,” she said. “Their homelessness that was just supposed to be a month or two months until they recovered, or three months, turns out to stretch into years. Please remember, there are a lot of us.”

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How to Design a Hybrid Workplace

The DealBook newsletter delves into a single topic or theme every weekend, providing reporting and analysis that offers a better understanding of an important issue in the news. If you don’t already receive the daily newsletter, sign up here.

As companies reopen their offices, they are deciding how the virtual work arrangements they’ve relied on during the pandemic will factor into their long-term plans — or not.

Google’s “flexible workweek” calls for employees to spend at least three days a week in the office and the rest at home. Microsoft’s “hybrid workplace” means most employees can spend up to half their time working remotely. Ford Motor’s “flexible hybrid work model” leaves it up to workers and their managers to decide how much time they need to spend in the office.

Goldman Sachs and JPMorgan Chase don’t have names for their postpandemic policies, because they expect most employees to return to the office for most of the time. Goldman’s C.E.O., David Solomon, called working from home an “aberration,” and JPMorgan’s chief, Jamie Dimon, said it had “serious weaknesses.”

But many companies have hatched a postpandemic plan in which employees return to the office for some of the time while mixing in more work from home than before. The appeal of this compromise is clear: Employers hope to give employees the flexibility and focus that come from working at home without sacrificing the in-person connections of the office.

How, exactly, to strike this balance can be less obvious.

Should companies require employees to be in the office on certain days? For a set number of days each week? How should those in the office accommodate colleagues working remotely?

To help answer pressing questions like these, DealBook assembled advice from experts about where to start, how to avoid common pitfalls, and the most important things to consider when not everyone is working in the same place.

a comparison of two accounting companies, researchers found that a flatter hierarchy helped facilitate virtual work, because remote workers didn’t feel too far from the center of the organization. Our own research also found a strong correlation between employee autonomy and productivity outside the office.

These factors make it easier for managers to address the most common challenges faced by hybrid teams. Take communication barriers: What if half the team is in the office and the other half is dialing in from home? If their locations are dispersed (so the Zoom callers can’t make it into the office) and the organization is flat and decentralized, the company could use a buddy system to make each person in the room responsible for keeping one particular Zoom caller fully in the conversation. If the caller misses something, the in-room buddy can fill in that person via text chat; if the caller is being talked over, the in-room buddy can step in to ensure that the person is heard.

Another common dilemma is deciding exactly who will be in the office on which days. This is further complicated by a significant gap between executive and employee perspectives, with most executives feeling that company culture depends on people spending at least three days a week in the office and most employees saying they want to spend at least three days a week working remotely.

monthly surveys about remote work that my research team has conducted since May, we’ve found that 30 percent of U.S. employees never want to return to working in the office, while 25 percent never want to spend another day working from home. Given such different views, it seems natural to let the workers choose. One manager told me: “I treat my team like adults. They get to decide when and where they work as long as they get their jobs done.”

But this approach raises two concerns. One is that it’s likely to result in “mixed mode,” the widely disliked situation when some people are at home and others are at the office, all appearing in one Zoom box in the conference room.

The second, less obvious concern is the risk to diversity. It turns out that who wants to work from home after the pandemic is not random. In our research we found that among college graduates with young children, women want to work from home full time almost 50 percent more often than men do.

This is problematic given evidence that working from home while your colleagues are in the office can hurt your chance of promotion. In a study I ran in China at a large multinational company, we randomly assigned volunteers to work remotely or remain in the office. Remote employees had a 50 percent lower rate of promotion after 21 months than their colleagues in the office.

categories of team interactions, which companies can consider when deciding how to structure work — regardless of where it happens.

Content interactions: communication about tasks, such as sharing feedback while sitting side by side. When work went virtual, more of these interactions took place asynchronously, through digital work tools such as Slack. One manager said communication had improved because individuals had more time to think.

Bounce interactions: new idea generation, as with an impromptu whiteboard brainstorming session. In the virtual version, individuals often generated ideas on their own, and then they and others emailed them back and forth. That made it harder to align with others; some teams adjusted by moving brainstorming sessions to videoconferences.

dealbook@nytimes.com.

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What the Coronavirus Variants Mean for Testing

In January 2020, just weeks after the first Covid-19 cases emerged in China, the full genome of the new coronavirus was published online. Using this genomic sequence, scientists scrambled to design a large assortment of diagnostic tests for the virus.

But the virus has mutated since then. And as the coronavirus has evolved, so has the landscape of testing. The emergence of new variants has sparked a flurry of interest in developing tests for specific viral mutations and prompted concerns about the accuracy of some existing tests.

“With these Covid diagnostics, we were on a time crunch, we had to get something out there,” said Lorraine Lillis, the scientific program officer at PATH, a global health nonprofit that has been tracking coronavirus tests. “Normally, diagnostics take a long, long time, and we’d normally challenge them with multiple variants.” She added: “And we’re doing that, but we’re doing it in real time.”

The Food and Drug Administration has warned that new mutations in the coronavirus could render some tests less effective. And last week, PATH launched two online dashboards to monitor how certain variants might affect the performance of existing diagnostic tests.

has listed four different molecular tests “whose performance could be impacted” by the variants, but notes that the tests should still work. Three of the tests have multiple targets; a fourth may be slightly less sensitive when the virus has one particular mutation and is present at very low levels. (The four tests are the TaqPath Covid-19 Combo Kit, the Linea Covid-19 Assay Kit, the Xpert Xpress and Xpert Omni SARS-CoV-2, and the Accula SARS-CoV-2 Test.)

“We don’t think that those four assays are significantly impacted,” said Dr. Tim Stenzel, who directs the F.D.A.’s office of in vitro diagnostics and radiological health. “It was more out of an abundance of caution and transparency that we made that information public.”

Antigen tests are less sensitive than molecular tests, but they are typically cheaper and faster, and they are being deployed widely in coronavirus screening programs. These tests detect specific proteins on the outside of the virus. Some genetic mutations could change the structure of these proteins, allowing them to escape detection.

in a recent paper, Dr. Izpisua Belmonte and his colleague, Mo Li, a stem cell biologist at King Abdullah University of Science and Technology in Saudi Arabia, described a new testing method that can identify mutations in up to five different regions of the coronavirus genome.

And Dr. Grubaugh and his colleagues have developed a P.C.R. test that can detect specific combinations of mutations that characterize three variants of concern: B.1.1.7; B.1.351, which was first detected in South Africa; and P.1, first found in Brazil. (The work has not yet been published in a scientific journal.)

Dr. Grubaugh said that researchers in Brazil, South Africa and elsewhere are already using the tests to sift through a mountain of coronavirus samples, identifying those that should be prioritized for full genomic sequencing. “Our group’s primary interest is enhancing genomic surveillance through sequencing, especially in resource-limited areas,” Dr. Grubaugh said. “If you want to know if there’s variants that are circulating, you need a way to triage.”

A number of companies are also beginning to release coronavirus tests that they say can differentiate between certain variants, although these are intended for research purposes only. Creating a test that can definitively diagnose someone with a particular variant is “infinitely harder,” Dr. Grubaugh said.

Similar mutations are springing up in different variants, which makes distinguishing among them more difficult. The mutations of interest will change as the virus does, and sequencing remains the best way to get a complete picture of the virus.

But tests that can screen for certain mutations could be an important public health tool, Ms. Agarwal said: “These newer diagnostics that are looking across the variants, I think will be really key in understanding the epidemiology of the virus and planning our next generation of efforts against it.”

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The New Taiwan Tensions

When Henry Kissinger secretly traveled to Beijing in 1971 to negotiate the re-establishment of diplomatic ties between the U.S. and China, he came bearing multiple requests — about the Vietnam War, nuclear arms, the Soviet Union and more. Kissinger’s Chinese counterpart, Zhou Enlai, had only one focus: Taiwan.

The U.S. needed to recognize the government in Beijing, not Taipei, as the only legitimate China, and the United Nations needed to expel Taiwan, Zhou said. Kissinger agreed to those terms, and President Richard Nixon triumphantly visited China the next year.

Still, the U.S. did not abandon Taiwan. Even as it refused to recognize Taiwan, it continued selling arms to its government and implicitly warned Beijing not to invade. The policy is known as “strategic ambiguity,” and it has endured since the 1970s.

Now some U.S. officials and foreign-policy experts worry that it has become outdated, as my colleague Michael Crowley explains. They think that President Biden may need to choose between making a more formal commitment to Taiwan’s defense or tempting China to invade.

released a statement saying, “Similar exercises will be conducted on a regular basis in the future.” Anne Applebaum of The Atlantic has suggested that a Chinese invasion “could happen at any moment” and that Biden should be prepared.

A military conflict still seems unlikely. Then again, military conflicts often seem unlikely until the moment they begin.

China’s current leaders view Taiwanese reunification much as Zhou did in 1971: urgent and vital. “Fast forward half a century, and the same issue — Taiwan — remains Beijing’s No. 1 priority,” as Niall Ferguson of Stanford University writes in a Bloomberg Opinion piece. To Beijing, Taiwan continues to be a source of embarrassment, the island where the losers in the country’s civil war fled in 1949 and whose government is propped up by foreign powers.

Just as important, though, is what has changed in recent decades. China has transformed itself from a poor country that endured the chaos of civil war, famine and the Cultural Revolution during the 20th century into one of the world’s leading powers. It has become the only serious rival to the U.S., economically and militarily.

severe human rights violations. It has crushed dissent in Hong Kong over the past year. Taiwan remains the only part of greater China that’s outside of Beijing’s grip.

“Xi seems to see the U.S. as weakened and distracted,” Michael Crowley told me, “but also focusing more and more on the China threat — leading to concern that he may see a window of opportunity that moves him to action in the near future.”

Biden and his foreign-policy team have decided to take a fairly tough approach to China. They do not believe Donald Trump’s specific policies, like his tariffs, were effective, but Biden’s team has accepted Trump’s view that Barack Obama and his predecessors were too soft on China, mistakenly hoping it would become friendlier as it became richer.

Even within this hawkish framework, though, the most effective approach to Taiwan is not obvious. Some Americans — including Robert Gates, a former defense secretary; Senator Rick Scott, a Florida Republican; Barney Frank, a Democratic former House member; and Richard Haass, the president of the Council on Foreign Relations — argue that while “strategic ambiguity” worked when China was weak, it no longer does. Today, they say, the U.S. must provide clarity, to prevent a thriving, affluent democracy of 24 million people from being overrun.

Other experts argue that a formal change in U.S. policy would be so confrontational as to force Beijing to choose between humiliation and war. “For Taiwan, strategic ambiguity remains a relatively successful policy,” Lu Yeh-chung of National Cheng-chi University in Taipei told The Times. Advocates for the status quo say that China’s leaders understand that an invasion of Taiwan could bring global condemnation, tough economic sanctions and a needless risk to China’s continuing rise.

Michael Crowley’s news analysis or Niall Ferguson’s history-laden Bloomberg essay.

business is booming for interior decorators: “We work for the one-half of the one-half of the 1 percent.”

Lives Lived: After a failed documentary project, Sharon Matola found herself in Belize looking after a jaguar, two macaws and 18 other half-tamed animals. The zoo she established there became a popular attraction, and Matola an outspoken advocate for animals. She died at 66.

Tokyo Olympics are set to begin in July, with the Paralympics scheduled to start in August. Years of planning — and billions in television dollars — mean Olympic organizers are keen to hold the event without postponing again.

But polling in Japan has trended strongly against the Games, as Motoko Rich and Hikari Hida report in The Times. Thousands of athletes and other participants will be heading to Tokyo, and less than 1 percent of Japan’s population has been vaccinated, CNBC reports. The country’s experience of the pandemic has been comparatively mild, with the level of infections and deaths far below that of the United States or Europe. But that’s not guaranteed to continue.

Though organizers have said that vaccinations will not be mandatory, the International Olympic Committee will supply vaccines for any competitors who need them. Some countries, like India and Hungary, are prioritizing Olympic athletes for vaccinations at home. Organizers are also barring spectators from overseas, and cheering is forbidden at the Olympic torch relay, which kicked off in Fukushima Prefecture last month.

One thing that is staying the same: The Games will still be called Tokyo 2020, reflected in heaps of T-shirts, mugs, signage and other branded merchandise.

slice of Florida lime pie.

People in their 20s and 30s are turning to Botox. Why?

“Shiva Baby,” a tense comedy about a young woman at the shiva of a family friend, mixes “big laughs with gut-wrenching discomfort,” Jason Bailey writes in a review.

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U.S. Looks to Build on Secret Portions of Taliban Deal to Reduce Violence

DOHA, Qatar — U.S. diplomats are trying to build on parts of the peace deal made with the Taliban last year, specifically the classified portions that outlined what military actions — on both sides — were supposed to be prohibited under the signed agreement, according to American, Afghan and Taliban officials.

The negotiations, which have been quietly underway for months, have morphed into the Biden administration’s last-ditch diplomatic effort to achieve a reduction in violence, which could enable the United States to still exit the country should broader peace talks fail to yield progress in the coming weeks.

If these discussions, and the separate talks between the Afghan government and Taliban falter, the United States will likely find itself with thousands of troops in Afghanistan beyond May 1. That’s the deadline by which all American military forces are meant to withdraw from the country under the 2020 agreement with the Taliban and would come at a time when the insurgent group likely will have begun its spring offensive against the beleaguered Afghan security forces.

Both of these conditions would almost certainly set back any progress made in the past months toward a political settlement, despite both the Trump and the Biden administrations’ fervent attempts to end the United States’ longest-running war.

two annexes of the 2020 deal, which were deemed classified by the Trump administration, is intended to stave off an insurgent victory on the battlefield during the peace talks by limiting Taliban military operations against Afghan forces, according to U.S. officials and others familiar with the negotiations. In return, the United States would push for the release of all Taliban prisoners still imprisoned by the Afghan government and the lifting of United Nations sanctions against the Taliban — two goals outlined in the original deal.

These new negotiations, which exclude representatives from the Afghan government, are being carried out amid a contentious logjam between the Taliban and the Afghans, despite pressure from international and regional actors on both sides to commit to some form of a path forward.

first reported by Tolo News, with requests that were not fully accepted by the U.S. negotiators and included severe restrictions on U.S. air power.

Many of the delays in securing a new deal to reduce violence stem from the original February 2020 agreement.

That deal loosely called for the Taliban to stop suicide attacks and large-scale offensives in exchange for the Americans forces scaling back drone strikes and raids, among other types of military assaults. But both sides interpreted those terms differently, officials said, and both have accused one another of violating the deal. The Taliban is also supposed to cut ties with Al Qaeda and other terrorist groups, but the U.S. intelligence community has seen little movement toward that goal.

Under the current arrangement, U.S. forces can defend their Afghan allies if they are being attacked, but the Taliban said U.S. airstrikes have been carried out against their fighters who were not attacking Afghan forces.

Digital spreadsheets maintained by the Taliban and viewed by The Times detail hundreds of purported U.S. violations. They record in detail the group’s wounded and killed, along with civilian casualties and property damage. However, the Taliban often do not distinguish between offensive operations carried out by Afghan security forces from those by U.S. forces, and several of the events The Times was able to independently verify from June 2020 did not involve American troops.

The new terms for a reduction in violence have been a serious point of contention during the past several months, during meetings frequently held at the Sharq Village and Spa, a luxurious resort in Doha, Qatar.

Meetings between American officials and the Taliban in Doha — including with high-level officials like then Secretary of State Mike Pompeo in November and the chairman of the Joint Chiefs of Staff, Gen. Mark A. Milley, in December — attempted to scale back Taliban attacks and stop the bloody assassination campaign wreaking havoc across the country, but made little headway.

With time running out, the Biden administration is hoping for more success, though these discussions continue to hit roadblocks.

Negotiations between the Afghans and the Taliban, which began in September, have practically come to a halt as the insurgent group has remained reluctant to discuss any future government or power-sharing deal while the United States remains noncommittal about whether it will withdraw from Afghanistan by May 1.

The Biden administration’s recent push for talks in Turkey could be promising, officials and experts said, but the Taliban have yet to agree to attend.

The insurgent group thinks Mr. Biden’s negotiators are manipulating the proposed agreement to reduce violence by asking for “extreme” measures, such as halting the use of roadside bombs and pausing attacks on checkpoints, according to people close to the negotiations.

Taliban negotiators say they believe the American requests equate to a cease-fire, while U.S. military officials say that if certain parameters are not clearly outlined, then the Taliban will shift their tactics to exploit any loopholes they can find — like they have done in the past.

Some of the more striking episodes happened in the past week when C.I.A.-backed militia forces were accused of killing more than a dozen civilians in a Taliban-controlled village in Khost Province in southeastern Afghanistan.

In retaliation, the Taliban authorized their fighters to attack the American military and C.I.A. base there and publicly took responsibility for the rocket attack that followed: a first for the insurgent group since it has mostly stopped, or refused to acknowledge, attacks against U.S. bases and troops, per the terms of the 2020 deal.

Some Taliban officials believe the C.I.A.-backed forces should be disbanded and their operations stopped if the insurgent group agrees to any further reduction in violence, according to people close to the negotiations, but it is unclear if the insurgent group has raised those concerns directly. Regardless, any such request is likely to fall on deaf ears as the U.S. military and intelligence community views these forces as some of the Afghans’ most effective, despite the litany of human rights abuses leveled against them.

The Khost incident highlights the difficulty of reaching an understanding when it comes to decreasing the intensity of the war, and the need for an international third-party monitoring body, such as the United Nations, in any future cease-fires or agreements to reduce violence, experts said.

It is unlikely the United States and Taliban will reach a new deal before May 1, analysts say, unless U.S. officials are willing to make serious concessions to prevent a violent offensive this spring, one that seems to already have started given the series of large attacks and assassinations by the Taliban in recent days.

Some experts have criticized the United States’ narrow focus on a short-term reduction of violence as a distraction from the larger effort of reaching a political settlement between the Afghan government and the Taliban.

“I am hard pressed to see what payoff there’s been for the amount of effort that has been put into trying to get limited violence reduction front-loaded in the peace process,” said Laurel E. Miller, a former top State Department official who worked on Afghanistan and Pakistan diplomacy under the previous two administrations. “It might be helpful for political optics in covering for an American withdrawal. But what’s going to make this stick afterward if there isn’t a real settlement? Nothing.”

Farooq Jan Mangal contributed reporting from Khost Province.

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Turing Award Goes to Creators of Computer Programming Building Blocks

When Alfred Aho and Jeffrey Ullman met while waiting in the registration line on their first day of graduate school at Princeton University in 1963, computer science was still a strange new world.

Using a computer required a set of esoteric skills typically reserved for trained engineers and mathematicians. But today, thanks in part to the work of Dr. Aho and Dr. Ullman, practically anyone can use a computer and program it to perform new tasks.

On Wednesday, the Association for Computing Machinery, the world’s largest society of computing professionals, said Dr. Aho and Dr. Ullman would receive this year’s Turing Award for their work on the fundamental concepts that underpin computer programming languages. Given since 1966 and often called the Nobel Prize of computing, the Turing Award comes with a $1 million prize, which the two academics and longtime friends will split.

Dr. Aho and Dr. Ullman helped refine one of the key components of a computer: the “compiler” that takes in software programs written by humans and turns them into something computers can understand.

rely on the strange behavior exhibited by things like electrons or exotic metals cooled to several hundred degrees below zero.

Quantum computers rely on a completely different kind of physical behavior from traditional computers. But as they create programming languages for these machines, Dr. Svore and her colleagues are still drawing on the work of the latest Turing winners.

“We are building on the same techniques,” she said.

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