Ukraine is in a war with Russia. The fighting on the ground is very hard. Ukraine needs a new plan to fight back.
The new plan uses drones. Drones are small planes with no pilot. They can fly a long way to attack targets inside Russia.
The drones attack Russia's oil refineries. These places make fuel for cars and tanks. The attacks cause big fires and stop the work.
Ukraine hopes this new strategy will hurt Russia's economy. The goal is to persuade Russia to change its plans and stop the war.