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Over one doorway at Elmina Castle, a former hub of the slave trade in Ghana, a brass plaque reads, “door of no return.” It was the last door that captive Africans went through in Africa before they were boarded onto ships and sold as slaves.

With Sacha Pfeiffer

Dollar stores are popping up across the country and raking in the profits. Critics say it all comes with a cost to the nation’s poor. We’re on it.

Guests

Nathaniel Meyersohn, CNN Business retail reporter. (@nmeyersohn)

Updated at 12:05 a.m. ET

Justice Ruth Bader Ginsburg has just completed three weeks of radiation treatment at Memorial Sloan Kettering Cancer Center in New York, the U.S. Supreme Court disclosed Friday.

The radiation therapy, conducted on an outpatient basis, began Aug. 5, shortly after a localized cancerous tumor was discovered on Ginsburg's pancreas. The treatment included the insertion of a stent in Ginsburg's bile duct, according to a statement issued by the court.

Updated at 8:05 p.m. ET

Brazilian President Jair Bolsonaro has responded to growing international condemnation over the fires sweeping through vast swaths of the Amazon rainforest by announcing that the army may be sent in to tackle them.

He said Friday that protecting the rainforest is "our duty" and he is acting to combat "criminal activities."

This week, the Trump administration announced a new regulation that would allow it to detain migrant families who have crossed the U.S. border illegally for an indefinite period of time.

In the 1960s, there was a terrific comedy in which a teenage Maoist scrawls a bit of graffiti that would become famous: "CHINA IS NEAR." Half a century on, China is here. It's here on our screens, where Hong Kong protests domination by the Communist mainland.

The prolific and celebrated Mexican accordion player Celso Piña died Wednesday of a heart attack in his hometown of Monterrey, Mexico. He was 66 years old.

His record label, La Tuna Records, announced Piña's death on Thursday.

Piña contributed greatly to the evolution of cumbia. The Colombian folk genre has had an interesting life span since its 17th century origins and very few musicians have added to that colorful history more than Celso Piña.

International concern is growing over the rapidly spreading fires that are destroying large swaths of the Amazon rainforest.

Lost in all the brouhaha about President Trump's scuttled plan to buy Greenland from Denmark has been this: What do the Greenlandic people think about the whole thing?

In the small capital city of Nuuk, "everybody is talking about it," says Alexander Montgomery-Andersen, a 30-year-old Greenlandic dancer and choreographer. "It's a little comical."

Updated at 11:35 a.m. ET

Signaling the possibility of more interest-rate cuts, Federal Reserve Chairman Jerome Powell said the central bank will "act as appropriate" to sustain the economic expansion as the trade war with China takes a toll on global growth and the U.S. economy.

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