Drones are “ubiquitous, because they are quite useful, and they're demonstrating that every day in Ukraine,” one analyst told NBC News.

Ukraine released new footage on Wednesday of its major drone strike on four Russian military airbases, showing attack drones targeting numerous Russian strategic bombers and landing on two airborne early warning and control planes.

By Ukraine’s count, that would make this operation one of the most efficient, dollar for dollar, in the history of warfare. No doubt the operatives behind the strike deserve to take a bow. But once the Russian targets stop smoldering at their bases,