Following NATO’s decision to further strengthen Ukraine’s air defences, President Volodymyr Zelensky has expressed reserved satisfaction. “We in Ukraine appreciate the efforts of every leader, every state that is really active, keeps its promises and tries to improve the capabilities of our air defence,” Zelensky said on Friday evening in his daily video address, which was unusually brief. Defence ministers from NATO states promised Ukraine the delivery of additional air-defence systems at a crisis meeting earlier Friday with Zelensky, NATO Secretary General Jens Stoltenberg said following the…