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. NATO allies are to give more air-defence systems to Ukraine, Secretary General Jens Stoltenberg announced on Friday, after a crisis meeting via videolink with defence ministers and Zelensky. NATO has “mapped…