New York City policemen tangled with demonstrators at a subway station on the opening day of the New York World's Fair, April 22, 1964. Youths attempted to stall the train, which was headed from the city to the fairgrounds, as a form of protest on behalf of civil rights for blacks. (Photo by Charles Gorry/AP Photo)

A dog walks past a mural by street artist Alex Martinez outside a shop which sells bags at Psiri area, central Athens, on Thursday, January 25, 2018. (Photo by Petros Giannakouris/AP Photo)

An mechanic in Brick Lane Bikes repairs a fixed wheel bike in their shop in Shoreditch on June 14, 2011 in London, England. The UK bike industry has seen a dramatic rise in the number of people building their own custom bikes or purchasing bespoke bikes. (Photo by Oli Scarff/Getty Images)

A jogger runs on the bank of Donaukanal channel in central Vienna, Austria, September 5, 2016. (Photo by Heinz-Peter Bader/Reuters)

“Cossacks are a group of predominantly East Slavic people who originally were members of democratic, semi-military communities in Ukraine and Southern Russia. They inhabited sparsely populated areas and islands in the lower Dnieper and Don basins, and played an important role in the historical development of both Ukraine and Russia”. – Wikipedia

Photo: Кубанский казачий хор (Kuban Cossack chorus) - Розпрягайте, хлопцi, коней (Unharness The Horses, Guys!) – Ukrainian

A full scale replica of the sphinx, which is part of an unfinished movie and animation tourism theme park, is pictured in Chuzhou, Anhui province, March 3, 2015. (Photo by Reuters/Stringer)

Students walk to school on the first day of their new school year in Giza, south of Cairo, Egypt September 25, 2016. (Photo by Mohamed Abd El Ghany/Reuters)

English reality television personality and country music singer Megan Elizabeth McKenna is seen at Soho House on May 24, 2018 in London, United Kingdom. (Photo by Splash News and Pictures)