A woman in a Ukrainian folk costume lays flowers to the Chernobyl victims monument in capital Kyiv, Ukraine, Monday, April 26, 2021. April 26 marks the 35th anniversary of the Chernobyl nuclear disaster. A reactor at the Chernobyl nuclear power plant exploded on April 26, 1986, leading to an explosion and the subsequent fire spewed a radioactive plume over much of northern Europe. (Photo by Efrem Lukatsky/AP Photo)





An abandoned carousel in the park is seen the ghost town of Pripyat close to the Chernobyl nuclear plant, Ukraine, Thursday, April 15, 2021. The vast and empty Chernobyl Exclusion Zone around the site of the world’s worst nuclear accident is a baleful monument to human mistakes. Yet 35 years after a power plant reactor exploded, Ukrainians also look to it for inspiration, solace and income. (Photo by Efrem Lukatsky/AP Photo)





Ukrainian honor guards stand to attention near the monument erected in memory of the victims of the Chernobyl explosion in Ukraine's capital Kyiv, Ukraine, Monday, April 26, 2021. (Photo by Efrem Lukatsky/AP Photo)





A Ukrainian soldier mans the front line near Horlivka in the Donetsk region on April 17, 2021. (Photo by Marian Kushnir/Radio Free Europe/Radio Liberty)





A militant of the self-proclaimed Luhansk People's Republic (LNR) points a weapon at fighting positions on the line of separation from the Ukrainian armed forces in Luhansk Region, Ukraine on April 21, 2021. (Photo by Alexander Ermochenko/Reuters)





Service members of the Ukrainian armed forces fix a motorcycle at fighting positions on the line of separation near the rebel-controlled city of Donetsk, Ukraine April 21, 2021. (Photo by Serhiy Takhmazov/Reuters)





A militant of the self-proclaimed Luhansk People's Republic (LNR) is reflected in a mirror at fighting positions on the line of separation from the Ukrainian armed forces in Luhansk Region, Ukraine on April 21, 2021. (Photo by Alexander Ermochenko/Reuters)





A service member of the Ukrainian armed forces is seen inside an armoured vehicle at fighting positions on the line of separation from pro-Russian rebels in Shyrokyne in Donetsk Region, Ukraine on April 21, 2021. (Photo by Oleksandr Klymenko/Reuters)





Service members of the Ukrainian armed forces drive armoured vehicles at fighting positions on the line of separation from pro-Russian rebels in Shyrokyne in Donetsk Region, Ukraine on April 21, 2021. (Photo by Oleksandr Klymenko/Reuters)





A Ukrainian serviceman stands at his position on the frontline with Russian-backed seperatists near the small city of Marinka, Donetsk region, on April 20, 2021. An emergency meeting between Russia, Ukraine and separatists was under way on April 20, 2021, in an effort to defuse soaring tensions over Russia's troop buildup along the ex-Soviet country's borders. A spokesman for the Ukrainian delegation told AFP that progress had been made on efforts to restore a ceasefire that was agreed last July but upended by a recent spate of clashes between Ukrainian troops and Moscow-backed separatists in eastern Ukraine. (Photo by Aleksey Filippov/AFP Photo)





A service member of the Ukrainian armed forces rides a bicycle at fighting positions on the line of separation near the rebel-controlled city of Donetsk, as the Avdiivka Coke Plant seen in the background, near Donetsk, Ukraine on April 17, 2021. (Photo by Serhiy Takhmazov/Reuters)





A cat walks as a service member of the Ukrainian armed forces stands guard at fighting positions on the line of separation near the rebel-controlled city of Donetsk, Ukraine on April 16, 2021. (Photo by Serhiy Takhmazov/Reuters)





A vintage doll, which was placed by a visitor, is seen on a bed at a kindergarten near the Chernobyl Nuclear Power Plant in the abandoned city of Pripyat, Ukraine on April 12, 2021. (Photo by Gleb Garanich/Reuters)





A child's gas mask is seen in a kindergarten near the Chernobyl Nuclear Power Plant in the abandoned city of Pripyat, Ukraine on April 12, 2021. (Photo by Gleb Garanich/Reuters)





Constructions of a Soviet made over-the-horizon (OTH) radar system “Duga” are seen near the Chernobyl Nuclear Power Plant, Ukraine on April 12, 2021. (Photo by Gleb Garanich/Reuters)





An interior view shows the house in the abandoned village of Zalissya near the Chernobyl Nuclear Power Plant, Ukraine on April 12, 2021. (Photo by Gleb Garanich/Reuters)





Children's beds are seen in a kindergarten near the Chernobyl Nuclear Power Plant in the abandoned city of Pripyat, Ukraine on April 12, 2021. (Photo by Gleb Garanich/Reuters)





The rusty emblem of the Soviet Union is seen over the ghost town of Pripyat close to the Chernobyl nuclear plant, Ukraine, Thursday, April 15, 2021. The vast and empty Chernobyl Exclusion Zone around the site of the world’s worst nuclear accident is a baleful monument to human mistakes. Yet 35 years after a power plant reactor exploded, Ukrainians also look to it for inspiration, solace and income. (Photo by Efrem Lukatsky/AP Photo)





Workers dismantle bas-relief at the Monument to the War Glory of the Soviet Army following a decision by local authorities in Lviv, Ukraine April 23, 2021. (Photo by Pavlo Palamarchuk/Reuters)





A Ukrainian serviceman sits near the front line with Russia backed separatists in the small town of Pisky, near Donetsk on April 21, 2021. Ukraine's President Volodymyr Zelensky on April 20, 2021, invited Russian leader Vladimir Putin to meet in war-torn eastern Ukraine, stressing that millions of lives were at stake from fresh fighting in the separatist conflict. (Photo by Aleksey Filippov/AFP Photo)





An Orthodox priest sprays holy water on believers after a service which marks the Orthodox feast of Palm Sunday, amid the coronavirus disease (COVID-19) outbreak, outside the Volodymyrsky Cathedral in Kyiv, Ukraine on April 25, 2021. (Photo by Valentyn Ogirenko/Reuters)