Attacks in the heart of Russia: Ukraine attacks billion-dollar industry – with simple means. Most of Russia's layered defenses “were built to identify and destroy larger targets, such as missiles,” experts said.

Ukraine is developing its own drones in the fight against Russia – with success. Moscow appears to be aware of the threat. Some air defense systems have been withdrawn from the front line and moved near important cities. Russian seaborne crude oil shipments are at their lowest level in almost two months.