Prince Harry has resigned as the patron of a charity he founded in southern Africa, his office said in a statement on Wednesday. The move followed a clash between the charity’s board of trustees and its board chair.

Harry and his fellow patron, Prince Seeiso of Lesotho, said they were quitting as faces of the charity, Sentebale, which is registered in Britain but operates in southern Africa, in solidarity with its board of trustees. Five of the board’s nine members resigned this week.

“It is devastating that the relationship between the charity’s trustees and the chair of the board broke down beyond repair, creating an untenable situation,” the two princes said in a joint statement. They added: “We are in shock that we have to do this, but we have a continued responsibility to Sentebale’s beneficiaries, so we will be sharing all of our concerns with the Charity Commission as to how this came about.”

Harry established Sentebale with Seeiso, the younger brother of King Letsie III of Lesotho, in 2006. Founded in honor of Harry’s mother, Diana, Princess of Wales, the charity raised funds for communities affected by the H.I.V. pandemic in Lesotho, a small landlocked kingdom that is one of the world’s poorest countries. In 2019, it expanded its work into nearby Botswana, and to addressing substance abuse, gender-based violence and other social ills among young people.

In recent months, the organization’s leadership has been at loggerheads. The five trustees who resigned said in a joint statement that they had called on the board’s chair, Sophie Chandauka, to resign from her position, after losing “trust and confidence” in her. They said that Ms. Chandauka had responded by filing a lawsuit in Britain “to block us from voting her out,” and that they were resigning to avoid burdening the charity with the cost of the suit.

“We could not in good conscience allow Sentebale to undertake that legal and financial burden and have been left with no other option but to vacate our positions,” they said. “This was not a choice willingly made, but rather something we felt forced into in order to look after the charity.”

Ms. Chandauka said in a statement that she had acted to expose what she described as “issues of poor governance, weak executive management, abuse of power, bullying, harassment, misogyny, misogynoir,” a term referring to pointed sexism toward Black women, “and the coverup that ensued.” In addition to filing a case in an English court, she said, she had reported the trustees to Britain’s Charity Commission.

“There are people in this world who behave as though they are above the law and mistreat people, and then play the victim card and use the very press they disdain to harm people who have the courage to challenge their conduct,” she said in her statement. Harry has previously brought high-profile legal cases against British newspapers.

Ms. Chandauka, a lawyer based in New York City, served on the Sentebale board from 2009 to 2015, and was appointed as its chair in July 2023. Her role now, she said, would focus on securing wider streams of funding for the organization.

The charity said in a statement on Wednesday that it had restructured its board under the leadership of Ms. Chandauka as part of a “transformation agenda” that would broaden the scope of its work to include business development and climate resilience in southern Africa.

The princes’ statement did not specifically address the allegations leveled by Ms. Chandauka.

“Although we may no longer be patrons, we will always be its founders, and we will never forget what this charity is capable of achieving when it is in the right care,” the princes said.

A spokeswoman for the Charity Commission said that the regulator was “assessing the issues to determine the appropriate regulatory steps.”

Paramilitary fighters with Sudan’s Rapid Support Forces began withdrawing from the battle-torn capital of Khartoum in large numbers on Wednesday, fleeing a city they had occupied since a ruinous war broke out nearly two years ago.

The capture of the city by Sudan’s military marks a dramatic turning point in what is currently Africa’s largest war. The Rapid Support Forces, known as the R.S.F., is likely to withdraw to its stronghold in Darfur, in the west of the country, according to analysts.

Surveillance drone footage circulated by Sudan’s military showed hundreds of R.S.F. fighters crossing a dam on the Nile at Jebel Aulia, south of the capital — their last remaining escape route.

Brig. Gen. Nabil Abdullah, a military spokesman, said the military had captured a major R.S.F. camp near the dam. “This was their last remaining camp in Khartoum,” he said. “A few remnants remain in pockets here and there. They will soon be destroyed.”

The two generals who lead Sudan’s military and the Rapid Support Forces, once allies, went to war nearly two years ago over a dispute about a plan for the R.S.F. paramilitary troops to be absorbed by the military.

The fighting has killed an estimated 150,000 people and displaced more than 13 million, sending nearly four million fleeing to neighboring countries — amounting to the world’s largest displacement crisis. Refugees have told of fleeing rapes, massacres and starvation.

Videos posted to social media showed civilians celebrating as Sudanese military forces arrived into the south of Khartoum, hours after the paramilitaries had fled.

In Kalakla, 10 miles south of the city center, civilians poured onto the streets, whooping and cheering, to hail Sudanese military forces who arrived on motorbikes.

Similar scenes unfolded in other neighborhoods closer to the center of the city as military forces advanced, videos verified by The New York Times showed.

The sudden withdrawal comes five days after the army captured the presidential palace in central Khartoum, a key symbolic and strategic victory that signaled a momentous change in the direction of the war.

Since then, the army has steadily seized control of the capital, taking control of the devastated city center before moving toward the international airport.

Pockets of R.S.F. fighters continued to resist the military’s advance. As Times reporters walked through the deserted city center on Tuesday, explosions and bursts of gunfire rang out from sporadic fighting a few streets away.

But on Wednesday morning, the army declared that it had seized control of the airport, which is littered with the ruins of passengers jets abandoned in April 2023, at the start of the war. On Wednesday afternoon, soldiers posed on the runway for television cameras before an abandoned plane.

The last concentration of R.S.F. fighters in the capital appeared to be in the southern and western part of Omdurman, on the west bank of the Nile. The army controls the northern half of Omdurman, and army controlled areas have received sporadic shellfire from R.S.F. positions in recent years.

Abdalrahman Altayeb contributed reporting.

The Trump administration intends to terminate the United States’ financial support for Gavi, the organization that has helped purchase critical vaccines for children in developing countries, saving millions of lives over the past quarter century, and to significantly scale back support for efforts to combat malaria, one of the biggest killers globally.

The administration has decided to continue some key grants for medications to treat H.I.V. and tuberculosis, and food aid to countries facing civil wars and natural disasters.

Those decisions are included in a 281-page spreadsheet that the United States Agency for International Development sent to Congress Monday night, listing the foreign aid projects it plans to continue and to terminate. The New York Times obtained a copy of the spreadsheet and other documents describing the plans.

The documents provide a sweeping overview of the extraordinary scale of the administration’s retreat from a half-century-long effort to present the United States to the developing world as a compassionate ally and to lead the fight against infectious diseases that kill millions of people annually.

The cover letter details the skeletal remains of U.S.A.I.D. after the cuts, with most of its funding eliminated, and only 869 of more than 6,000 employees still on active duty.

In all, the administration has decided to continue 898 U.S.A.I.D. awards and to end 5,341, the letter says. It says the remaining programs are worth up to $78 billion. But only $8.3 billion of that is unobligated funds — money still available to disburse. Because that amount covers awards that run several years into the future, the figure suggests a massive reduction in the $40 billion that U.S.A.I.D. used to spend annually.

A spokesperson for the State Department, which now runs what is left of U.S.A.I.D., confirmed the terminations on the list were accurate and said that “each award terminated was reviewed individually for alignment with agency and administration priorities, and terminations were executed where Secretary Rubio determined the award was inconsistent with the national interest or agency policy priorities.”

The memo to Congress presents the plan for foreign assistance as a unilateral decision. However because spending on individual health programs such as H.I.V. or vaccination is congressionally allocated, it is not clear that the administration has legal power to end those programs. This issue is currently being litigated in multiple court challenges.

Among the programs terminated is funding for the United Nations Food and Agriculture Organization, which conducts surveillance for diseases that can be transmitted from animals to humans, including bird flu, in 49 countries. Some major programs to track and fight malaria, one of the world’s top killers of children, have also been ended.

Dr. Austin Demby, the health minister of Sierra Leone, which relies on Gavi’s support to help purchase vaccines, said he was “shocked and perturbed” by the decision to terminate U.S. funding and warned that the ramifications would be felt worldwide.

“This is not just a bureaucratic decision, there are children’s lives at stake, global health security will be at stake,” he said. “Supporting Gavi in Sierra Leone is not just a Sierra Leone issue, it’s something the region, the world, benefits from.”

In addition to trying to reach all children with routine immunizations, Sierra Leone is currently battling an mpox outbreak, for which Gavi has provided both vaccines and critical support to deliver them, he said.

“We hope the U.S. government will continue to be the global leader it always been — putting money in Gavi is not an expenditure, it’s an investment,” Dr. Demby said

Gavi is estimated to have saved the lives of 19 million children since it was set up 25 years ago. The United States contributes 13 percent of its budget.

The terminated grant to Gavi was worth $2.6 billion through 2030. Gavi was counting on a pledge made last year by President Joseph R. Biden Jr. for its next funding cycle.

New vaccines with the promise to save millions of lives in low-income countries, such as one to protect children from severe malaria and another to protect teenage girls against the virus that causes cervical cancer, have recently become available, and Gavi was expanding the portfolio of support it could give those countries.

The loss of U.S. funds will set back the organization’s ability to continue to provide its basic range of services — such as immunization for measles and polio — to a growing population of children in the poorest countries, let alone expand to include new vaccines.

By Gavi’s own estimate, the loss of U.S. support may mean 75 million children do not receive routine vaccinations in the next five years, with more than 1.2 million children dying as a result.

The U.S. has been among the top donors to the organization since its creation, and became the largest during the Covid-19 pandemic. While European countries have historically provided significant funding, many are now reducing foreign aid spending as they grapple with the change in U.S. policy on Ukraine and the U.S. demand that they increase their defense spending. Japan, another major Gavi donor, is struggling with a depreciating currency.

Dr. Sania Nishtar, Gavi’s chief executive, said that she hoped the Trump administration would reconsider the decision to end its support. Gavi’s work keeps people everywhere, including Americans, safe, she said. In addition to protecting individual children, vaccination reduces the possibility of large outbreaks. The organization maintains global stockpiles for vaccines against diseases such as Ebola and cholera, deploying them in rapid response efforts for epidemics.

Gavi’s structure requires countries to pay part of the cost of vaccines, with their share growing as income levels rise; middle-income countries are weaned from support.

The memo says that 869 U.S.A.I.D. personnel were working as of last Friday, while 3,848 were on administrative leave and 1,602 are in the process of being laid off. Of 300 probationary employees who were initially fired, 270 have returned to work following a court order prohibiting their dismissal.

Dollar Tree is selling the Family Dollar brand to two private capital firms for just over $1 billion, the company announced on Wednesday after years of struggling with Family Dollar’s operation.

The private equity firms Brigade Capital Management and Macellum Capital Management are buying Family Dollar together, according to the statement. In the announcement, Dollar Tree’s chief executive, Michael Creedon, called the sale a “major milestone in our multiyear transformation journey.”

Dollar Tree purchased Family Dollar in 2015 for about $9 billion, hoping the merger would help both stores reach more customers. But it struggled to effectively manage the Family Dollar brand. About a year ago, Dollar Tree said it would close nearly 1,000 of Family Dollar’s roughly 8,000 stores.

In June, Dollar Tree announced it was exploring plans to sell Family Dollar, citing inflation, theft and the end of pandemic-era benefits from the federal government.

Family Dollar’s stores are predominantly in urban areas and serve mostly low-income shoppers, who have been squeezed the hardest by inflation. Dollar Tree has more stores in suburban areas and caters to consumers with relatively higher incomes.

Dollar Tree also reported its latest quarterly earnings on Wednesday, noting potential drags on its sales including “tariffs or other measures that create barriers or restrictions on trade.” The company also warned in December that tariffs could affect its prices and inventory.

Other U.S. retailers have also been struggling recently. Walgreens has said it plans to close about 1,200 stores over the coming three years. The party supplies retailer Party City announced late last year that it would close all its stores. And last week, Forever 21’s operator in the United States filed for bankruptcy as its stores struggled to compete with online retailers.

Once called Thule Air Base, now known as Pituffik Space Base, this U.S.-operated installation in northwestern Greenland is one of the most strategically important military sites in the world — even if most Americans have never heard of it.

“It is quite literally the outermost eye of American defense,” said Peter Ernstved Rasmussen, a Danish defense analyst. “Pituffik is where the U.S. can detect a launch, calculate the trajectory and activate its missile defense systems. It’s irreplaceable.”

The outpost is getting new attention as President Trump, who has vowed to make Greenland part of the United States, sends a high-level delegation to the island this week. The visitors will include Vice President JD Vance, who said on Tuesday that he intended to visit “our guardians” in the Space Force while there.

About 150 U.S. Air Force and Space Force personnel are permanently stationed at Pituffik (pronounced Bee-doo-FEEK). They handle missile defense and space surveillance, and the Upgraded Early Warning Radar based here can detect ballistic missiles in their earliest moments of flight.

Each summer, about 70 members of the New York Air National Guard fly into Pituffik to support science missions. Using the U.S. military’s only ski-equipped aircraft, the LC-130, they deliver researchers and supplies to camps on the ice sheet.

Pituffik is the only U.S. military base on Greenland.

The history

The American military presence in Greenland began during World War II, when Greenland was a Danish colony. After Nazi Germany occupied Denmark in 1940, Greenland was suddenly isolated and undefended. The United States struck a quiet deal with Denmark’s ambassador in Washington — bypassing the German-controlled government in Copenhagen — for American troops to build airfields and weather stations on the island.

By 1941, U.S. forces had landed, setting up defenses and scanning the North Atlantic for German submarines. A decade later, Denmark and the United States formalized the arrangement with a defense treaty granting Washington broad rights to operate military facilities on the island. Greenland is now a semiautonomous part of Denmark, which, like the United States, is a NATO country.

During the Cold War, Thule became a key Arctic outpost. From here, long-range American bombers could reach the Soviet Union, and massive radar systems were built to detect missiles crossing the polar route — the shortest path between the two superpowers.

One of the era’s strangest experiments was Camp Century, a nuclear-powered base built under the ice in the late 1950s as part of a secret project called Iceworm. The plan was to test whether nuclear missiles could be hidden and launched from beneath the surface.

“It was Cold War ambition at its wildest,” Mr. Rasmussen said. “They built a nuclear-powered base in one of the most hostile environments on Earth just to see if it could be done.”

The ice proved too unstable, and the base was abandoned. But the waste — including radioactive material and diesel — is still buried and scientists warn that warming temperatures could eventually expose it.

The base also left a lasting mark on Greenland’s Indigenous population. In 1953, about 130 Inuit were forcibly relocated from their homes near Thule to a harsher settlement farther north, poorly suited for traditional hunting. Compensation came decades later, but resentment remains.

The base’s name changed two year ago from Thule to Pituffik, which means in Greenlandic “the place we tie our dogs.”

The location

Pituffik sits above the 76th parallel on Greenland’s northwest coast, about 750 miles from the North Pole. It’s one of the most remote military installations on Earth.

The nearest settlement, Qaanaaq, is more than 70 miles away and home to fewer than 650 people. Many hunt seals, walrus and, occasionally, polar bears to survive.

In winter, the sun disappears for weeks and temperatures drop below minus 30 Fahrenheit (minus 34 Celsius). Despite the conditions, Pituffik’s airfield runs year-round. Ships can reach the base only during a narrow summer window when the sea ice temporarily retreats.

The base’s technology

Pituffik is part of a global web of U.S. defense infrastructure and a crucial station. Military experts say that as new threats like hypersonic missiles emerge, the early-warning systems at Pituffik are indispensable.

“Hypersonic missiles don’t go into space — they fly low, they maneuver, and we have no way to intercept them once they’re launched,” explained Troy J. Bouffard, a retired U.S. Army officer and Arctic defense expert. “That makes early warning more important than ever — and that’s where Pituffik comes in.”

If a missile were launched from Russia or China toward North America, it would, Mr. Bouffard said, most likely pass over the Arctic.

Pituffik’s ground-based sensors are crucial in that case, said Mr. Bouffard, because satellites don’t work well in high latitudes.

Lasers don’t work in the Arctic, either, he added. “The air columns are full of ice crystals — basically tiny mirrors — and lasers and mirrors don’t get along,” he said.

Mr. Bouffard sees Pituffik’s role expanding beyond radar.

“It could also serve as a forward staging base or a key line of communication,” he said. “The more forward these locations are, the more useful they are.”