United States Air Force Academy graduates cheer as the United States Air Force Thunderbirds fly over the graduation for the Class of 2021 at Falcon Stadium on May 26, 2021 in Colorado Springs, Colorado. Chairman of the Joint Chiefs of Staff General Mark A. Milley gave the commencement address to the 1,019 graduates from the academy. (Photo by Michael Ciaglo/Getty Images)

Residents gather to watch fireworks rehearsals ahead of the upcoming 100th anniversary of the founding of China's ruling Communist Party in Beijing on Tuesday, June 22, 2021. Chinese authorities have closed Beijing's central Tiananmen Square to the public, eight days ahead of a major celebration being planned to mark the 100th anniversary of the founding of the ruling Communist Party. (Photo by Ng Han Guan/AP Photo)

Fans of Croatia are seen during the UEFA Euro 2020 Championship Round of 16 match between Croatia and Spain at Parken Stadium on June 28, 2021 in Copenhagen, Denmark. (Photo by Antonio Bronic/Reuters)

Pigeon fancier Yonisbel Santana poses for a photo at his rooftop in Havana, Cuba, May 18, 2021. Havana's pigeon keepers crane out of a window, intently watching the grey birds take flight. Mostly staying indoors due to the country's worst outbreak of COVID-19 since the coronavirus pandemic began in March last year, Cubans are increasingly breeding pigeons as a form of escape. (Photo by Alexandre Meneghini/Reuters)

A brown bear cub by the Khailyulya River in north-east Kamchatka, Russia on July 24, 2021. (Photo by Yuri Smityuk/TASS)

A man walks pat sculptures with face masks on along an alley in Beijing on August 3, 2021. (Photo by Noel Celis/AFP Photo)

American singer and rapper Ashton Nicole Casey, known professionally as Ashnikko performs on Day 2 of Leeds Festival 2021 at Bramham Park on August 28, 2021 in Leeds, England. (Photo by Matthew Baker/Getty Images)

American singer and songwriter Kacey Musgraves performs onstage during the 2021 MTV Video Music Awards at Barclays Center on September 12, 2021 in the Brooklyn borough of New York City. (Photo by John Shearer/MTV VMAs 2021/Getty Images for MTV/ViacomCBS)