Soldiers stop to buy goods at the main market of Diffa, Niger, March 23, 2015. Diffa is where Nigerien and Chadian troops fighting insurgent group Boko Haram are based at. (Photo by Joe Penney/Reuters)

An Aymara woman with a sheep waves to the crowd during a Christmas parade in La Paz, Bolivia December 12, 2015. (Photo by David Mercado/Reuters)

An employee of the National Park Service takes a selfie with President Barack Obama, left, in the background meeting with the crowd after a tour of Everglades National Park on Earth Day, Wednesday, April 22, 2015, in Florida. Obama used the visit to warn of the damage that climate change is already inflicting on the nation's environmental treasures. (Photo by Lynne Sladky/AP Photo)

Buddhist believers wearing faces masks to help protect against the spread of the new coronavirus wait to attend a service to pray for overcoming the COVID-19 outbreak and to celebrate Buddha's birthday at the Chogyesa temple in Seoul, South Korea, Thursday, April 30, 2020. (Photo by Ahn Young-joon/AP Photo)

Relatives wearing personal protective equipment (PPE) mourn a man, who died from the coronavirus disease (COVID-19), during his funeral at a crematorium in New Delhi, India on April 21, 2021. (Photo by Adnan Abidi/Reuters)

A pro-democracy protester wears a hat in the shape of a yellow rubber duck, which has become a recent symbol for the ongoing protests, during an anti-government rally in Bangkok on November 22, 2020. (Photo by Lillian Suwanrumpha/AFP Photo)

Melissa March, 13, is seen backstage during the Cuban Otaku festival in Havana, Cuba, July 24, 2016. (Photo by Alexandre Meneghini/Reuters)

Clowns Perlita and Tapetito, wearing protective gear amid the new coronavirus pandemic, speak with resident Enrique Zeballos as they arrive to disinfect his home free of charge, in El Alto, Bolivia, Friday, September 11, 2020. The lack of traditional employment for the clowns due to the pandemic has led them towards other avenues of making money. But for people with limited income they provide their disinfection services free of charge. (Photo by Juan Karita/AP Photo)