In this photo taken Thursday, January 16, 2020, a Samburu boy uses a wooden stick to try to swat a swarm of desert locusts filling the air, as he herds his camel near the village of Sissia, in Samburu county, Kenya. The most serious outbreak of desert locusts in 25 years is spreading across East Africa and posing an unprecedented threat to food security in some of the world's most vulnerable countries, authorities say, with unusual climate conditions partly to blame. (Photo by Patrick Ngugi/AP Photo)

A Chinese tourist wears a mask as she arrives at Suvarnabhumi Airport during a welcome ceremony of Chinese Lunar New Year travellers in Bangkok, Thailand on January 22, 2020. (Photo by Soe Zeya Tun/Reuters)

Armed police Taser a man inside the grounds of the Houses of Parliament on 11 December 2018. (Photo by Peter Nicholls/Reuters)

In this photo taken on Thursday, March 7, 2019, the sun rises over the star on the spire on top of a Stalin-era skyscraper, now the Radisson Royal Hotel on the banks of the Moskva River in Moscow, Russia. (Photo by Dmitry Serebryakov/AP Photo)

A signing session during the International tattoo convention at Tobacco Dock in east London, England on September 27, 2019. (Photo by Steve Parkins/Rex Features/Shutterstock)

Fans dressed as Darth Vader and Chewbacca take a boat trip to the Skelligs on May 4, 2018 in Portmagee, Ireland. The first ever Star Wars festival is taking place against the backdrop of the famous Skellig Michael island which was used extensively in Episode VII and Episode VIII of the popular science fiction saga. The small fishing village of Portmagee, which is closest to the location, has seen a boom in tourism following the latest films. The vilage will host a Star Wars drive-in and a Star Wars themed Irish dancing competition over the weekend. (Photo by Charles McQuillan/Getty Images)

A woman carries a floral design handbag at the RHS Chelsea Flower Show in London, Britain on May 21, 2018. The annual show of floral art, timed to coincide with the RHS Chelsea Flower Show nearby, sees over sixty shops, restaurants and local businesses compete for prizes, with the awards given by RHS (Royal Horticultural Society) judges, this year on the theme of “Summer of Love”. (Photo by Toby Melville/Reuters)

A demonstrator attends a protest against fare hikes for city buses in Rio de Janeiro January 16, 2015. Amid a marked economic downturn and high inflation, bus fares went up in Sao Paulo, Brazil's largest city, from 3 to 3.50 reais, and in Rio, the former capital, from 3.0 to 3.40 reais. (Photo by Mauro Pimentel/Reuters)