Kyiv, Ukraine — Ukrainian President Volodymyr Zelenskyy warned on Friday that Russia’s capture of a major nuclear power plant threatened a radiation catastrophe, as the country marked the anniversary of the 1986 Chernobyl nuclear disaster. Russian forces seized the Zaporizhzhia nuclear power plant (ZNPP) in southern Ukraine in the first days of its 2022 invasion. Both sides regularly accuse each other of endangering safety at the …