The arms race between Russia and Ukraine is gaining momentum. Both sides strike at cities in the deep rear, and are constantly developing new weapons for this. Since late summer, Russia has been using the new Filin cruise missile. And Ukraine is not only targeting Russian warehouses, data centers and refineries with drones, but is also working on its own new ballistic missiles. Who is more successful in waging the so-called “war of the cities”? BBC Russian Service correspondent Ilya Abishev explains. Russian authorities recognized Ilya as a “foreign agent.” The BBC strongly objects to this decision and is challenging it in court.