21 Of The Most Powerful Photos Of This Week

An area of forest in Altamira, Brazil, is left in ashes following widespread fires, Aug. 27.

Swedish climate activist Greta Thunberg, 16, arrives in New York City after a 15-day journey crossing the Atlantic in the Malizia II, a zero-carbon yacht, Aug. 28.

Brazilian actor Sônia Braga shows her hands painted red, representing blood, during a protest in Rio de Janeiro in defense of the Amazon as fires burn in that region, Aug, 25.

Brazil's indigenous chief Raoni Metuktire of the Kayapo people arrives to give a press conference in Bidart, France, on Aug. 26, as the annual G7 summit draws to a close.

French President Emmanuel Macron and US President Donald Trump attend a working session on "International Economy and Trade, and International Security Agenda" in Biarritz, France, Aug. 25, on the second day of the annual G7 summit.

A demonstrator wearing a mask depicting British Prime Minister Boris Johnson protests outside the gates to Downing Street in central London, Aug. 28.

A student holds a sign, honoring a woman who was shot in her eye at a protest, during a rally to call for political reform outside the City Hall building in Hong Kong, Aug. 22.

Protesters clash with police after an anti-government rally in Tsuen Wan District, Hong Kong, Aug. 25.

Technicians stand in front of pyrotechnics going off during an international air show in Bucharest, Romania, Aug. 24.

Life jackets float during a training exercise by the German NGO Sea-Eye, which was on its way to a search and rescue zone off the North African coast, Aug. 29.

Immigrants form a line upon their arrival at the harbor of Málaga, Spain, Aug. 29, after an inflatable boat carrying 132 people was rescued by the Spanish coast guard.

A US Border Patrol agent inspects the discarded passport of a young girl found at an illegal crossing spot on the Rio Grande near Mission, Texas, Aug. 22.

Yemen's Houthi rebels dispose of expired aid packages from the UN's World Food Programme in the capital of Sanaa, Aug. 27.

Mario, 34, a Honduran immigrant who lost his leg while traveling en route to the United States on a freight train known as La Bestia, rests during a physiotherapy session at a rehabilitation center in Silao, Mexico, Aug. 19.

A woman and a soldier, wearing period costumes, wave from a US Sherman tank as they reenact celebrations of the liberation of Paris in the French capital, Aug. 25.

A couple poses for a selfie with giant salvaged busts of former US presidents in Williamsburg, Virginia, Aug. 25.

Tatev, 31, who is from Armenia and has lived in the US for 17 years, went into labor before her US citizenship ceremony and refused to go to hospital until she was sworn in as a US citizen, according to Judge Cormac J. Carney, who is seen performing an impromptu naturalization ceremony before the official event in Los Angeles, Aug. 22.

One of the two newborn twin panda cubs is seen in its incubator at Pairi Daiza wildlife park, in Brugelette, Belgium, Aug. 24.

Firefighters use a ladder while extinguishing a fire at an industrial building in St. Petersburg, Aug. 22.

US Supreme Court Justice Ruth Bader Ginsburg receives an honorary doctoral degree at the University of Buffalo School of Law, Aug. 26.

A reveler covered in tomato pulp participates in the annual Tomatina festival in the town of Buñol, Spain, Aug. 28.