Russian President Vladimir Putin can wage war everywhere and in every way, and he wants all of us in the West to know it. That's why he's not just blowing up parts of Kyiv again. He's also threatening Ukraine, the European Union and NATO with nuclear escalation while simultaneously ramping up the hybrid warfare that he, as a KGB-trained warlord, has spent decades mastering.
Technically, the Western countries he attacks can't always prove right away that Putin is personally responsible for a specific act of aggression. That's in the nature of hybrid warfare, which deliberately blurs the boundaries between military, technological, psychological and other kinds of combat and dodges easy attribution. But experts are picking up that signature whiff.