In the early hours of September 15th, Russia launched a significant drone assault on Kyiv while a separate unmanned aircraft was intercepted over Lithuanian airspace — NATO territory — prompting Poland to scramble fighter jets in response. What was once a war contained within Ukraine's borders has quietly become something larger: an aerial conflict that alliance members are now defending against in their own skies. Each interception, each scrambled jet, each activated defense system asks the same unresolved question humanity has always faced at the edge of escalation — where does one nation's