Russia attacked Kyiv and other Ukrainian cities in the early hours of Monday with a horde of self-detonating drones – once again bombing critical infrastructure but with a sinister tactical shift that seemed intended to deprive Ukrainians not only of heat, electricity, and water but also of sleep.

Air raids sirens rang out in Kyiv at 2 a.m., the shrill sound amplified by the emptiness of the capital’s streets during its overnight curfew.

Russia has been bombing Ukrainian cities relentlessly with missiles and drones since early October seeking to destroy the country’s energy grid and leave citizens without urgent services in the frigid winter, including a heavy missile barrage on Friday.

But Monday’s strikes mark the first time Russia had sent such a large fleet of drones overnight – potentially a recognition by Russian commanders that their noisy, slow-flying Iranian drones are far easier to spot and shoot down during daylight.... Read More: Washington Post