Su-25 jet fighters release smoke in the colours of the Russian state flag over Red Square during a flypast rehearsal ahead of a parade on Victory Day, which marks the anniversary of the victory over Nazi Germany in World War Two, in Moscow, Russia on May 5, 2021. (Photo by Shamil Zhumatov/Reuters)

A young woman poses for a selfie at Red Square which is under preparations for the Victory Parade during sunset in Moscow, Russia, Monday, April 26, 2021. Russia will celebrate celebrate 76 years of the victory in WWII on May 9, 2021. (Photo by Alexander Zemlianichenko/AP Photo)

North Korean soldiers participate in a mass military parade at Kim Il-Sung square in Pyongyang on October 10, 2015. North Korea was marking the 70th anniversary of its ruling Workers' Party. (Photo by Ed Jones/AFP Photo)

Russian communists lay flowers at Soviet leader Joseph Stalin's tomb on Red Square next to the Kremlin wall in Moscow, Russia, December 21, 2015. Russian communists are marking the 136th anniversary of Josef Stalin's birthday. (Photo by Sergei Ilnitsky/EPA)

Figurines representing French Brigade of Lancers are seen on a 40-square-metre miniature model of the June 18, 1815 Waterloo battlefield, in Diest, Belgium, in this picture taken on April 29, 2015. Waterloo enthusiast Willy Smout said he spent 40,000 hours and around 150,000 euros over the past 40 years, to recreate the battlefield as closely as possible in a purpose-built room in his house. (Photo by Francois Lenoir/Reuters)

Israelis in costumes spray water on each other during the annual Tel Aviv Water War on Hbima Square in Tel Aviv, Israel,10 July 2015. The annual water fight is on his 11th edition. (Photo by Abir Sultan/EPA)

Actor Cornelius Obonya as Jedermann and actress Brigitte Hobmeier as Buhlschaft perform on stage during a dress rehearsal of Hugo von Hofmannsthal's drama “Jedermann” (Everyman) at Domplatz square in Salzburg, Austria, July 16, 2015. The play is directed by Julian Crouch and Brian Mertes and will premiere as part of the annual Salzburg cultural Festival on July 19, 2015. (Photo by Leonhard Foeger/Reuters)

People participate in a pillow fight to mark International Pillow Fight Day in the Heroes' Square, in central Budapest, Hungary, Saturday, April 2, 2016. The Pillow Fight Day attracts tens of thousands people in more than 100 cities all over the World each year. ((Photo by Zoltan Balogh/MTI via AP Photo)