Ukrainian President Volodymyr Zelenskyy on Wednesday urged European countries to step up deliveries of critical air defenses, as funding pledges from a key NATO-backed program fall behind schedule. “Ballistic missiles are Russia's last argument in this war against Ukraine, and we must find a sufficient response to them,” Zelenskyy told reporters in Kyiv , so it “would help greatly for our partners to focus particularly on protection against ballistic missiles.” Kyiv has repeatedly asked NATO