The large-scale attack comes days after Trump says Putin had "very strongly" promised response to Ukraine "Spider web" attack.

The Ukrainian operation was “grounds for a nuclear attack,” declared Vladmir Solovyov, a firebrand host on Russian state TV, calling for strikes on the Ukrainian presidential office in Kyiv, and beyond.

Russia asked the U.N. nuclear watchdog on Friday to mediate between Moscow and Washington to resolve the question of what to do with U.S. nuclear fuel stored at a Ukrainian power plant controlled by Russian forces.

Former Rep. Chris Stewart, a former fighter pilot, says the U.S. isn’t prepared for this change in modern warfare.

Ukraine’s security service released footage Wednesday of its attack on Russian war planes at multiple airbases across the country. In the span of a few hours on Sunday, nearly a third of Moscow’s strategic bomber fleet was destroyed or damaged with cheaply made drones sneaked into Russian territory, according to Ukrainian officials.

Technological advances have given threadbare militaries and rebel fighters the ability to strike stunning blows against far stronger forces.