Siddharth Hariharoan tries to control a toy helicopter with his mind through the MindWave Mobile, a device by NeuroSky that reads brain waves.

A nurse attending to a patient with dengue at Chulucanas Hospital in Peru in February.

Yokihiro Shimura teaching a group of students at one of the few public baseball diamonds in Rio de Janeiro.

Jair Bolsonaro speaking at the Conservative Political Action Conference in Maryland in March 2023.

Marielle Franco, who was killed in 2018, was one of Brazil’s rising political stars and had battled corruption and gangs in Rio de Janeiro.

The charges are the latest sign of criminal investigations closing in on Brazil’s former president.

Jean Paul Prates, chief executive of the Brazilian oil company Petrobras, at the company’s headquarters in Rio de Janeiro.

A brush fire burning in February on a farm in Roraima, Brazil’s northernmost state. The fires in the Amazon are the result of a mix of extreme weather events and climate change, experts said.

A brush fire burning in February on a farm in Roraima, Brazil’s northernmost state. The fires in the Amazon are the result of a mix of extreme weather events and climate change, experts said.

Ukrainian soldiers in the Donetsk region. The war has wrecked Russia’s standing with much of Europe, but the country is not as isolated as U.S. officials had hoped.

Secretary of State Antony J. Blinken, left, and President Luiz Inácio Lula da Silva of Brazil met on Wednesday.

Gang members at a prison in El Salvador. Over the last two decades, prisons have become recruitment centers for Latin America’s cartels and gangs, experts say, strengthening their grip on society.

Cape Town in 2021. The livestock carrier that was the source of this week’s foul odor in the city was expected to leave by Wednesday.

The opening of Interpol’s general assembly last year in Vienna. The organization’s secretary general is due to leave in November.

The Brazilian ambassador to Israel, Frederico Meyer, foreground right, with Israel’s foreign minister, Israel Katz, at Yad Vashem, the Holocaust memorial in Jerusalem, on Monday.

President Luiz Inácio Lula da Silva of Brazil at the African Union Summit in Addis Ababa, Ethiopia, on Saturday.

People cheering and throwing confetti at the John Travolta puppet as he pops out of a private party and becomes part of the crowd in the streets in Olinda, Brazil.

Jair Bolsonaro campaigning for a second term in 2022 in São Paulo, Brazil.

On Jan. 8 of last year, a mob ransacked Brazil’s Congress and other offices, claiming an election had been stolen. Unlike the Jan. 6 rioters in Washington, the Brazilian protesters have almost no support now.

Carrying offerings to the sea on Friday in Rio de Janeiro as part of an annual rite by devotees of Afro-Brazilian religions.

Indigenous people take part in a demonstration outside the Congress in Brasília, Brazil, in April.

Police officers stood guard near the site of a stabbing that left several children injured in Dublin on Thursday.

The leaders of BRICS nations, including President Xi Jinping of China, participated in a virtual summit on the war in Gaza.

Taylor Swift performing in Inglewood, Calif., in August. A concertgoer died in the extreme heat during Swift’s concert on Friday in Rio de Janeiro.

Taylor Swift fans waiting in line for the artist’s Saturday show in Rio de Janeiro. Ms. Swift eventually postponed the show because of the sweltering heat in the city.

A police raid aimed at dismantling neo-Nazi groups in Nova Petrópolis, Brazil, last summer.

Fluminense will face Boca Juniors in the Copa Libertadores final on Saturday.

The Rio Negro, a tributary of the Amazon River, reached its lowest level ever recorded this week.