Breeding in American zoos has done little to improve genetic diversity, experts say, because China typically sends abroad animals whose genes are already well represented in the population.

Yet American zoos clamor for pandas, and China eagerly provides them. Zoos get attention and attendance. Chinese breeders get cash bonuses for every cub, records show. At the turn of the century, 126 pandas lived in captivity. Today there are more than 700.

Kati Loeffler, a veterinarian, worked at a panda breeding center in Chengdu, China, during the program’s early years. “I remember standing there with the cicadas screaming in the bamboo,” she said. “I realized, ‘Oh my God, my job here is to turn the well-being and conservation of pandas into financial gain.’”

Kimberly Terrell, who was director of conservation at the Memphis Zoo until 2017, said, “There was always pressure and the implication that cubs would bring money.” She noted that zoo administrators insisted on inseminating its aging female panda every year, despite concerns among zookeepers that it was unlikely to succeed. It never did.

“The people who actually worked day to day with these animals, who understand them best, were pretty opposed to these procedures,” she said. The zoo said its breeding efforts followed all program requirements.

The Times collected key documents and audiovisual materials from the Smithsonian archives and supplemented them with materials obtained through open-records requests. The trove, which spans four decades, includes medical records, scientists’ field notes and photographs and videos that offer crucial evidence of breeding procedures, side effects and the conditions in which pandas were held.

They show that the riskiest techniques happened in the program’s infancy, but that aggressive breeding continued at the National Zoo and at other institutions for years. A panda in Japan died during sperm collection in 2010. Chinese breeding centers, until recently, separated cubs from their mothers to make the females go back into heat.

This panda proliferation has prompted debates among zoo workers and scientists over whether it is ethical to subject animals to intensive breeding when they have no real prospect of being released into the wild. But those discussions have largely played out privately because researchers and zookeepers said that criticizing the program could hurt their ability to work in the field.

when a species is on the verge of extinction, conservationists sometimes make a last-ditch effort to save it.

with pandas, zoo administrators take chances again and again simply to make more cubs, while keeping the grimmest details from the public.

“The Chinese government’s destruction of cultural heritage aims to erase, replace and rewrite what it means to be Uyghur,”

China’s Foreign Ministry on Friday repeated its claims that Xinjiang has around 24,000 mosques and that the number of them per capita among Muslims in Xinjiang is higher than in many Muslim countries. It said that China fully protects the human and religious rights of all ethnic minorities and described the ASPI report as “smear and rumor.” It denied the existence of detention camps in Xinjiang.

ASPI estimated that around half of important Islamic sacred sites—many of which are supposed to be protected under Chinese law—have been damaged or altered since 2017.

The report estimated there are fewer than 15,500 mosques left intact in Xinjiang, the lowest number since the 1980s, when Uighurs had just begun rebuilding mosques destroyed during Mao Zedong’s Cultural Revolution. Most of the land where mosques were razed remained vacant, it said.

The campaign is part of a longer-term trend to transform communities in the name of public safety. The strategy has gained pace under President Xi Jinping who has called for the “Sinicization” of religion

During a visit the following month, the Journal found that some facilities had indeed been closed, with former detainees sometimes sent away to work in factories. One facility had been converted into a prison after being previously described as a school.

Of the dozens of facilities ASPI identified as recently under construction, roughly half were higher-security facilities. The most-secure facilities had high walls, multiple layers of perimeter barriers, watchtowers and dozens of cell blocks with no apparent outside exercise yard for detainees

Authorities are likely singling out people who they have lost hope of re-educating and putting them into long periods of incarceration, said Mr. Leibold. It is “the only way to really explain their pretty remarkable expansion,”

One challenge in pressuring China’s government over its Xinjiang policies is the relative silence of Muslim-majority countries. ASPI made its work available in 10 different languages to try to raise awareness beyond the English-speaking world

The fever never really cooled, of course. It transmuted into the raging xenophobia and nativism that put Donald Trump in the White House

What the fellow told me that day still holds true: Lots of Republicans know in their hearts that this problem is real

Certainly, some Republicans seem to believe that scientists are engaged in a worldwide conspiracy to cook the books on climate change. But they’re not all that crazy. And you can see this in the way that bits and pieces of sensible climate policy keep sneaking through Congress.

As long as nobody in those red districts back home is really watching, Republican members of Congress will adopt low-key measures to help cut emissions. They especially like ones that offer additional benefits, like building up the tax base in rural communities, as wind and solar farms do.

they tell you the political situation may not be quite as hopeless as it looks. Lurking below the surface of our ugly politics is, I believe, a near consensus to do something big on climate change.

Even if Democrats take Congress and the White House in 2020 and push forward an ambitious climate bill in 2021, they are likely to need at least a handful of Republican votes in the Senate

We ought to hope for more than that. The policy will be more durable if it passes Congress with substantial bipartisan majorities, as all of our landmark environmental laws did.

the Republicans — some of them, at least — are starting to sense political risk in continued climate denial. Their constituents, battered by the fires and torrential rains and the incessant rise of tidal flooding, are knocking on the closet door.

Frank Luntz, the pollster who wrote a scurrilous memorandum 17 years ago counseling Republicans to obfuscate the science of climate change, is among those who have come around

The job of high school teachers is to impart knowledge and deliver measurable results, which requires finding a way to reach, and ideally even inspire, their students.

“How would you keep the attention of 15 teenagers and bond with them?” one Friends teacher texted me, insisting on anonymity because of a school policy that discourages teachers from speaking to the media without permission. “You MUST joke and be yourself and connect with them on their terms. It’s the only way to be good at this.”

Any teacher who spends three decades in the classroom, speaking extemporaneously for hours on end to a roomful of teenagers, is going to have awkward moments. Frisch might have had more of them, and they may have been a bit more awkward. But that was how he connected, and it was perhaps a way of connecting that is no longer possible. “Everybody knew this guy was off — weird behavior, quirky,” said one parent who, fearing retribution against her child, insisted on anonymity. “Maybe in the ’70s that would have been O.K., but not when you’re paying $45,000 a year in tuition.”

There aren’t enough seats in the historically more desirable uptown institutions — Spence, Dalton, Trinity — to meet demand; and for families who live in neighborhoods like the Village, TriBeCa or Battery Park, Friends is a much more convenient option. Friends now sees itself as a competitor to these schools, and in some respects, it has become indistinguishable from them.

Even before Frisch’s termination, there was a feeling among some in the Friends community — parents, teachers and especially alumni — that in its race to keep pace with a changing city, the school was losing touch with the Quaker ethos that had long distinguished it.

The school’s Quaker identity calls for it to be faithful to its progressive tradition, but in the new age of identity politics, it is not always easy to know what the right stance on a particular issue should be. Just a few months before the Frisch incident, some 20 parents had raised questions about the scheduled speaking engagement of a visiting scholar, Dave Zirin, a sportswriter for the Nation magazine and a Friends alumnus who had been critical of Israel in his writings. In 2012, there were heated objections to a musical performance in the meetinghouse by Gilad Atzmon, an Israel-born saxophonist and self-described “proud, self-hating Jew” who has written that Palestinians were “brutally ethnically cleansed” and suggested that if Israel starts a nuclear war with Iran, “some may be bold enough to argue that Hitler might have been right after all.” The Harvard Law School professor emeritus and noted gadfly Alan Dershowitz publicly criticized Friends — and Lauder personally — for refusing to cancel the appearance.

Lauder did not consider the “Heil Hitler” episode a close call. “Personally, I was appalled,” he told me. “I couldn’t imagine, even as a joke — and I grew up watching ‘Hogan’s Heroes’ — that in a class that had nothing to do with history or World War II or Nazism or teaching German language that an incident like that could happen.” I asked Lauder why he felt he needed to go so far as to fire Frisch. “One of our pledges is to make all of our students feel safe,” he replied. “And that is something that I take very, very seriously.”

That no one has accused Frisch of being an anti-Semite was beside the point: His invocation of the Nazi salute in a classroom full of high school students, regardless of his intentions, was enough to end his career. On today’s campus, words and symbols can be seen as a form of violence; to many people, engaging in a public debate about the nuances of their power is to tolerate their use.

Frisch, who first learned about the claims after his termination, denied ever having told a student to kill himself and said that he had no memory of the inappropriate touching that had been described.

we spoke at length about the “Heil Hitler.” Frisch said he was embarrassed, both by the fact that he had made the gesture in the first place and by his subsequent failure to recognize the seriousness of such a lapse in judgment. But he was also surprised by the school’s reaction to it. “I trusted while I was at Friends that because of my long-term commitment to the school, that as I need to change to meet the changing dynamics of the classroom, the school would help me learn and provide the support I needed to make those changes,” he told me.

The dynamics of the classroom are changing. These changes are partly specific to the hothouse environment of the campus in 2018. But they also connect to something much bigger. High schools have become genuinely unsafe: The “Heil Hitler” salute happened on the very same day as the Parkland massacre. And beyond the confines of the campus, a crude, violent bigotry that had long seemed part of the distant past has suddenly resurfaced, with neo-Nazis literally marching in the streets. The question now is what do we want our response to this new world to be

During the 12 days that he spent in limbo between his suspension and termination, Frisch, in the spirit of the Quaker commitment to reconciliation, drafted a letter of apology to his students that he was never allowed to send. Among other things, he planned to say that he was worried about the rise of anti-Semitism and that he was still learning lessons from his mistake. “You think about things like Charlottesville,” he told me. “Now, we don’t make jokes like this.”

Not all immigrants get the same push at home, he says; some parents discouraged their youngsters from going to the city center to mix. Sweden, he is afraid, has entered a vicious circle of immigration, segregation and growing mutual hostility.

The situation grew worse with the latest mass influx of refugees, in 2015, after which a number of suburbs became almost exclusively migrant. Considered “no go” areas by some Swedes, these neighborhoods are known to outsiders only from horrific headlines. What people don’t get to see, Mr. Abdirahman worries, is the bus driver or the cleaning lady working themselves ragged to get their children into a university.

the government, dominated by the traditionally strong Social Democrats and the centrist Moderate Party, did far too little. That left an opening for the Sweden Democrats, until recently a group relegated to the racist fringe of Swedish politics. In the past few years, the party has recast itself; just like the populist Alternative für Deutschland party in Germany and the Five Star Movement in Italy, it has repositioned itself as anti-establishment and anti-immigrant.

The Sweden Democrats accuses all other political actors and the media of “destroying” Sweden, calls for a suspension of the right to asylum and promotes an exit of Sweden from the European Union.

Sweden always imagined itself as something different, a society bound by its unique brand of togetherness. But that self-satisfaction justified a myopic approach to the very complex problem of how to integrate vast numbers of foreigners. If you believe in giving everyone a state-of-the-art apartment, social welfare and child benefits, then it’s unlikely you will tackle the hurdles of the highly regulated Swedish labor market.

Sweden Democrats profit from the fact that they were often the first to point to the downsides of immigration. Yet as much as they despise wishful thinking, they replace it with simplistic thinking. No matter what problems there might be in Sweden — housing shortages, school closings, an overburdened health care system — in the view of the Sweden Democrats, it is always one group’s fault: migrants.

Even if the Sweden Democrats win big on Sunday, the election might be a force for good. The Moderate Party, which is likely to take second place, might split over the question of whether to rule with them. And the Social Democrats, already under pressure to move to the left, might likewise fall apart. Sweden’s party landscape, in other words, might be blown to pieces.If the country is lucky, some parts from this explosion will bind together as a new force — one that takes seriously the need for realism on immigration and integration, without falling for the siren song of right-wing populism.