The US says "peace has never been closer" after a Donald Trump-Volodymyr Zelenskyy phone call. Zelenskyy called the conversation "frank" and "positive" as he asked for air defence help. There was ...

it's the same with the EU." So this approach allows NATO members to act in a group, but not under the NATO umbrella, avoiding vetoes from member states who don't approve or don't wish to be involved.