A pro-democracy demonstrator fights with a Soviet soldier on top of a tank parked in front of the Russian Federation building on August 19, 1991, after a coup toppled Soviet President Mikhail Gorbachev. The same day, thousands in Moscow, Leningrad, and other cities answered Russian Republic President Boris Yeltsin's call to raise barricades against tanks and troops. (Dima Tanin/AFP/Getty Images)

Meanwhile, over on Portobello beach, members of the Upsala circus take a stroll before their fringe debut, Ping-Pong Ball Effect in Edinburgh, England on August 1, 2017. (Photo by Murdo Macleod/The Guardian)

In this Wednesday, April 12, 2017, photo, waitresses wait outside a restaurant in Pyongyang, North Korea. A generational divide is quietly growing in North Korea, often hidden behind relentless propaganda. On the streets there are young women in not-quite mini-skirts and teenage boys with baseball hats cocked sideways, K-pop style. (Photo by Wong Maye-E/AP Photo)

An undated handout image provided by UNICEF Germany on 20 December 2016 shows the “UNICEF Photo of the Year 2016” by Iranian freelance photographer Arez Ghaderi. Ghaderi won the first prize for his picture of a girl in a makeshift tent city in the Razavi Khorasan province, Iran, it was announced at a ceremony in Berlin, Germany on 20 December 2016. (Photo by Ariz Ghaderi/EPA/UNICEF Deutschland)

Workers carry sacks of tea leaves at a tea estate in Nagaon district in the northeastern state of Assam, India, August 22, 2016. (Photo by Reuters/Stringer)

Jeepneys are seen as an enforcer manages traffic at a busy street in Manila on May 30, 2017. Jeepneys, once hailed as the “King of the Road” and a cultural symbol in the Phillipines to rival New York's yellow taxis, may soon disappear from Manila's gridlocked streets, as authorities move to phase out the Philippines' iconic World War II-era minibuses, citing pollution and safety concerns. (Photo by Noel Celis/AFP Photo)

Women with their faces painted as various Hindu deities take part in a celebration a day after the first democratic constitution was announced in Kathmandu, Nepal September 21, 2015. Nepal adopted its first full democratic constitution on Sunday, a historic step for a nation that has witnessed war, a palace massacre and devastating earthquakes since a campaign to create a modern state began more than 65 years ago. (Photo by Navesh Chitrakar/Reuters)