Ukrainian President Volodymyr Zelenskyy says Russian forces are blockading Ukraine’s largest cities to create a “humanitarian catastrophe” with the aim of persuading Ukrainians to cooperate with them. He says Russians are preventing supplies from reaching surrounded cities in the center and southeast of the country. Zelenskyy made the remarks in his nighttime video address to the nation. He filmed his talk outside in Kyiv, with the presidential office in the lamplight behind him. He again appealed to Russian President Vladimir Putin to hold talks with him directly.