Over two days of talks in Brussels, NATO’s top officers are expected to detail plans for what are set to be the biggest military exercises in Europe since the Cold War later this year. The wargames are meant as a fresh show of strength from NATO and its commitment to defend all allied nations from attack.

We need public and private actors to change their mindset for an era in which everything was plannable, foreseeable, controllable and focused on efficiency to an era in which anything can happen at any time. An era in which we need to expect the unexpected,” he said as he opened the meeting.