Salma abdelaziz reports how important drones have become on ukrainian battlefields. reporter: this is drone warfare as russia wants you to see it. moscow s troops hunting down ukrainian defenders. backed by surveillance from the skies. we sat down with a military expert to parse through the 22 minutes of aerial footage released by pro-kremlin channels. so what am i looking at here, this column? russian forces there, about eight soldiers. the first moved into the trench to clear that trench. we see that ukrainian soldier popping out of that shed over and over again, don t we? yeah. small arms fire taking place now and he is essential lipined on that location. whoever is on the drone will speak to the soldiers on the ground. this is close and intense combat with limited visibility. the russian fighters here depend on the drone operator for a bird s eye view and realtime