ROME: Italian Prime Minister Mario Draghi waves after addressing the lower house of parliament in Rome on Thursday, July 21. Draghi resigned from office after several key parties in his coalition boycotted a confidence vote in the government on Wednesday night (Remo Casilli/Reuter)

BASE ANDREWS: US President Joe Biden speaks to the media as he arrives at Joint Base Andrews in Maryland on Wednesday, July 20. The next day, Biden said he tested positive for covid-19. He said he was experiencing mild symptoms and would continue to work while in isolation (Jonathan Ernst/Reuters)

COPENAGHEN: An elephant is sprayed with water to stay cool at a zoo in Copenhagen, Denmark, on Wednesday, July 20 (Mads Claus Rasmussen/Ritzau Scanpix/AFP/Getty Images)

VILOMARA: A fire engine is driven through El Pont de Vilomara, Spain, during a wildfire on Monday, July 18 (Albert Gea/Reuters)

RIO DE JANEIRO: A land-art fresco made with biodegradable paint by the French-Swiss artist Saype covers part of Copacabana Beach in Rio de Janeiro on Monday, July 18. It's part of his worldwide project "Beyond Walls." He said he is creating a symbolic human chain around the world with the aim of promoting togetherness, kindness and openness to the world (Silvia Izquierdo/AP)