Why are Ukraine’s cheap, slow drones so successful against Russian targets?

The video shows a Russian missile launcher sitting in the open. Suddenly, it is enveloped in a huge fireball.

Ukrainian officials say what looked like a video game was actually the work of a small, relatively cheap Turkish-made drone that has had a surprisingly lethal impact on Russia forces.

A U.S. defense official said Monday that Ukraine has made “terrific” use of Turkish Bayraktar TB2 unmanned aerial vehicles, which can loiter over tanks and artillery and destroy them with devastatingly accurate missile fire. The official said the U.S. is working to help keep the drones flying.