Ukrainian President Volodymyr Zelensky called for more air-defence support from Western partners after a Russian missile attack killed at least 17 people in the northern Ukrainian city of Chernihiv on Wednesday. There were also more than 60 injured, including several children. “This would not have happened if Ukraine had received sufficient air defence and if the world had been determined enough to counter Russian terror,” Zelensky wrote on Telegram. The Ukrainians do not lack determination in their fight, Zelensky added. “We need sufficient determination from our partners and sufficient suppo…