Ukraine’s low-cost drone strike on Russia’s bomber fleet has forced the US military to confront an urgent vulnerability: its own exposed aircraft at home and abroad. With US bases largely unhardened and easily accessible, military leaders are now sounding the alarm over drone swarms, surveillance incursions, and the rising risk of mass-casualty attacks. As Ukraine rewrites modern warfare with consumer-grade drones, senior US officials admit that America's defences are outdated and dangerously underprepared.