The world this week
Politics Volodymyr Zelensky, Ukraine’s president, said there was “nothing left” of Mariupol after three weeks of indiscriminate Russian shelling. The 100,000 remaining residents are desperately short of food. The Pentagon said that Russian soldiers had entered part of the port city. But defenders continued to resist. More than 3.5m people have fled Ukraine since Vladimir Putin’s invasion began. Elsewhere Russia struggled. NATO estimated that it had lost more than 7,000 soldiers in a month. Ukrainian troops went on the offensive in parts of the country, attempting to retake Kherson, a southern city. Russian forces near Kyiv, the capital, have not advanced for two weeks, though missiles continue to strike the city. Mr Zelensky said that any peace deal with Russia would have to be approved by a nationwide referendum. He…