Almost every week this summer brought new reports of drone incursions over the alliance’s eastern frontier—the airspace over which is now a front line.
Related stories
‘Anger and shame’: Macron denounces France’s nationwide rioting, looting
What’s behind Europe’s youth protests?
What we know so far about deadly fire at Canadian military base
India’s crackdown on cockroaches, critics and cameras
Opinion | Latin America’s Coming Population Bust
How will Europe deal with youth-led protests?