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Saleem Abbas is the kind of student who sits in the front row. He's the first to try to answer a question. He eagerly repeats the Mandarin expressions that his teacher throws at the class: "Is this your family or not?" he repeats after the teacher. Then: "I have a mother."

A Romanian man was briefly detained on Tuesday in connection with Saturday's high-profile rape and killing of Bulgarian journalist Viktoria Marinova, but after questioning, a Bulgarian official said the unidentified man would be released without charge.

Marinova's beaten and strangled body was found in the bushes by the banks of the Danube River in the northern Bulgarian city of Ruse, police said.

Updated 4:55 p.m. ET

Nikki Haley is resigning as the U.S. ambassador to the United Nations and will leave the Trump administration at the end of the year, she said Tuesday.

It is not immediately clear what prompted the move. She informed her staff Tuesday, NPR's Michele Kelemen reports.

Haley appeared with President Trump on Tuesday morning at the Oval Office, where he called her a "fantastic person" and said Haley had told him six months ago that she might take time off at the end of the year.

For decades, whenever stevedore Giorgos Nouchoutidis arrived for work at the port of Piraeus, he would breathe in the fresh, briny sea breeze and feel a surge of pride.

The Standard Gauge Railway station in Nairobi is easily the most impressive public building in Kenya.

While a lot of Kenyan government buildings are drab and functional and date back to colonial days, this station is adventurous. It's all gray and modern. Geometric shapes form an abstract locomotive, and red neon announces the "Nairobi Terminus."

The ancient Maya might be known for their mathematical aptitude, their accurate calendars, and their impressive temples. But did you know they were also salt entrepreneurs?

During the peak of Maya civilization – from 300 to 900 A.D. — coastal Maya produced salt by boiling brine in pots over fires. The end result was shaped into salt cakes, then paddled by canoe to inland cities and traded at extensive markets.

Interpol President Meng Hongwei has resigned, after being detained by Chinese authorities who accuse him of corruption. The shocking turnabout comes days after Meng's wife said the career police officer had disappeared; one week ago, he left France to visit his native China.

As clerical sex abuse scandals buffet the Catholic Church, a three-week assembly of bishops is under way in Rome on how to make the Church relevant for young people. But the assembly, known as a synod, will likely be dominated by what many analysts call Catholicism's worst crisis since the reformation.

Roughly 250 priests, bishops, cardinals and some younger laypersons are participating in the synod.

In the opening mass, pope Francis urged them "to dream and to hope."

Jorge Luis Borges's iconic Patagonia story "The South" opens in Buenos Aires, in Argentina's north. The protagonist, Juan Dahlmann, is a librarian who's spent his whole life in the city, dreaming of moving to the Patagonian ranch he inherited from his grandfather.

To Dahlmann, Patagonia represents an alternate world, a macho Wild West filled with tough guys and gauchos, men in control of their fates.

Some of the world's top climate scientists have concluded that global warming is likely to reach dangerous levels unless new technologies are developed to remove greenhouse gases from the atmosphere.

The United Nations' Intergovernmental Panel on Climate Change (IPCC) says pledges from the world's governments to reduce greenhouse gases, made in Paris in 2015, aren't enough to keep global warming from rising more than 1.5 degrees Celsius (2.7 degrees F) above pre-industrial temperatures.

Like many churchgoers in Romania, retired engineer Marius Tufis opposes same-sex marriage.

"I don't like man with man and woman with woman," he said, frowning in the sun after Sunday's service. "Our religion does not accept this."

Same-sex marriage is already banned in Romanian civil code, but that's not enough for Tufis. He worries that the European Union, which he sees as divided between the liberal West and the conservative East, will force Romania to change the law.

Updated at 1:40 ET Monday

Preliminary results show that Jair Bolsonaro, a far-right congressman and former army captain, returned a commanding lead in the first round of Brazil's presidential election.

Now, with 99 percent of the votes counted, Bolsonaro and Fernando Haddad of the Workers' Party will head to a runoff on Oct. 28.

Shetland is an archipelago of a hundred or so islands in the North Sea, featuring ancient hills, valleys and lochs. The string of islands is known for its remote beauty: it's a 12-hour ferry ride to get there from the northeast Scottish city of Aberdeen.

Because of that location, far off the coast of mainland Scotland, cartographers have long taken a particular approach to representing Shetland on maps: they draw a box around it, and put that box wherever it fits.

A game of soccer is underway beneath a hazy afternoon sun.

At first glance, it looks like any other you might encounter in Brazil, a nation celebrated for its unwavering addiction to this sport.

A group of teenage boys in brightly colored shirts battles for the ball, urged on by a coach who is barking instructions with the ferocity of a drill sergeant.

Look again, though, and you soon spot a difference: Not one of these young and skillful players is Brazilian. They are all Chinese.

Five days after a prominent Saudi journalist went missing at the Saudi Arabian consulate in Istanbul, there are still more questions than answers.

Jamal Khashoggi, a veteran journalist who has been critical of Saudi Crown Prince Mohammed bin Salman, hasn't been seen since Tuesday, when he went into the consulate to get documents for his upcoming marriage to a Turkish woman, and apparently never came out.