The second of six C-17 Globemaster III airlifters for the United Arab Emirates Air Force and Air Defence is being assembled at the Boeing assembly facility on May 10, 2011 in Long Beach, California. The UAE will take delivery of three more C-17s this year and two in 2012 as it modernizes its airlift capabilities. (Photo by Kevork Djansezian/Getty Images)

In this photo taken in October 1917, provided by Russian State Documentary Film and Photo Archive, a machine gunner looks through a window at his position near the Kremlin in Moscow, Russia. The 1917 Bolshevik Revolution was long before the digital revolution allowed anyone to instantly document events. But the clumsy cameras of the time still caught some images that capture the period's drama. (Photo by Russian State Documentary Film and Photo Archive via AP Photo)

Young couples compete in Rock' n'Roll & Co, an all- Russian acrobatic rock' n'roll competition in Kazan, Russia on November 4, 2017. Acrobatic rock’n’roll is a discipline for couples combining energetic dancing with acrobatic moves. (Photo by Yegor Aleyev/TASS via Getty Images)

WWII veterans attend a ceremony to place tobacco pouches of soil from WWII mass graves of Red Army soldiers abroad, in the custody of the Central Armed Forces Museum in Moscow, Russia on March 6, 2020. The grave soil has been brought from Abkhazia, Germany, Kyrgyzstan, US, Ukraine, France, Estonia, Mongolia, Bulgaria, UK, Uzbekistan and South Ossetia. (Photo by Alexander Shcherbak/TASS)

Russian Orthodox priest, Father Nikolai Gensitsky, speaks with believers while having a festive meal during the Easter celebrations in a church in the village of Yekaterininskoye in Omsk Region, Russia on April 19, 2020. (Photo by Alexey Malgavko/Reuters)

Medical workers wearing protective gear to protect against coronavirus infection, carry a patient at infectious diseases hospital where patients with coronavirus are treated in St.Petersburg, Russia, Wednesday, June 3, 2020. (Photo by Dmitri Lovetsky/AP Photo)

Women sing and dance as children gather in the background during the so-called parade of children's troops in Rostov-on-Don, southern Russia, May 14, 2015. About 500 children aged from 4 to 10, members of youth military patriotic clubs, honor guards and paratroopers took part in the event, which was organized under the guidance of Commander of Southern Military District Colonel-General Alexander Galkin and was held to honor World War Two veterans and mark the 70th anniversary of the victory over Nazi Germany, according to local media. (Photo by Eduard Korniyenko/Reuters)