Ukraine unleashed more than a hundred drones smuggled deep into Russia in what it called its most damaging attack yet.

Across the country, swarms of small explosive drones descended onto military bases and destroyed a large part of Russia's nuclear bomber fleet. The flying bombs were smuggled into Russia by Ukrainian intelligence services in a plot known as Operation Spiderweb.

Costing as little as $400 apiece, Kyiv’s flying machines are successfully neutralizing sophisticated Russian equipment worth thousands of times more