Photographers gather to take pictures of pilot Andre Borschberg (C) ahead of the take off of Solar Impulse 2-a solar powered plane- in Nanjing, China, May 31, 2015. The world's largest solar-powered airplane, Solar Impulse 2, took off from eastern China's Nanjing on Sunday to continue its round-the-world voyage. The Swiss-made plane left Nanjing's Lukou International Airport at 2:39 in the early morning, with former fighter pilot Borschberg at the controls alone for the entire 8,200-kilometer flight from Nanjing to Hawaii, the toughest leg of its marathon adventure. (Photo by Reuters/Solar Impulse)

A municipal worker who helped with traffic control near a school is presented with flowers at the end of the national college entrance examinations, known as the gaokao, in Beijing, Friday, June 10, 2022. More than 11 million high school students throughout China took the annual college entrance exams which started on Tuesday after the country has just overcome severe COVID-19 outbreaks in Shanghai and Beijing, according to state media. (Photo by Ng Han Guan/AP Photo)

John Pfaff lays on a fallen tree Thursday, September 10, 2020, in Salt Lake City. Two days after a windstorm wreaked havoc in Utah, many schools remain closed and tens of thousands are still without power. (Photo by Rick Bowmer/AP Photo)

Pedestrians wear masks as smoke and haze from bushfires in New South Wales blankets the CBD in Sydney, Australia, 10 December 2019. The New South Wales environment department says visibility across east and southwest Sydney was at a “hazardous” level on Tuesday morning, while air quality was poor in southwest Sydney and hazardous in northwest Sydney. (Photo by Steven Saphore/EPA/EFE)

The Clavie, a burning barrel packed with tar soaked sticks fixed on the top of a pole, is surrounded by people at the Doorie Hill on January 11, 2018 in Burghead, Scotland. People welcome in the New Year with the fire ceremony which has ancient roots dating back to the 1750s, when the Julian calendar was reformed in Britain. It is believed to bring good luck for the coming year. (Photo by Jeff J. Mitchell/Getty Images)

In this undated photo provided by the North Korean government, North Korean leader Kim Jong Un tries a weapon during his three-day inspection from Aug. 3 until August 5, 2023 at major munitions factories in North Korea. Independent journalists were not given access to cover the event depicted in this image distributed by the North Korean government. The content of this image is as provided and cannot be independently verified. Korean language watermark on image as provided by source reads: “KCNA” which is the abbreviation for Korean Central News Agency. (Photo by Korean Central News Agency/Korea News Service via AP Photo)

A ceramic dog sleeps next to the gravesite of “Moses” at the Aspin Hill Memorial Park in Aspen Hill, Maryland August 25, 2015. Established in 1921, Aspin Hill contains the graves of more than 50,000 animals, from movies stars to WWI heroes to the dogs of former FBI Director J. Edgar Hoover. National Dog Day is celebrated in the United States on August 26. (Photo by Gary Cameron/Reuters)

A man strikes a pose in front of a giant torta, or sandwich, during a press conference to promote the 13th annual Torta Festival, in Mexico City, Wednesday, July 20, 2016. The five day festival presents a variety of the Mexican street food made from the most exotic ingredients that include ostrich or stingray, to the classic ham, grilled steak or slow cooked pork. The festival's purpose is to maintain the tradition of eating tortas, and promote the vendors of the Mexican sandwich. (Photo by Marco Ugarte/AP Photo)