Just a few days before Christmas, Ukrainian President Volodymyr Zelensky has appealed to the fighting spirit of his compatriots to not let up on the defence of the country. “Maximum attention is needed for defence, maximum effort for the state, maximum energy for Ukraine to achieve its goals,” said Zelensky in his evening video message broadcast in Kiev on Thursday. The time to rest will come later, he said, even as air raid sirens over Kiev and other Ukrainian cities heralded another night of Russian drone attacks. According to preliminary information from Kiev’s military administration, debr…