Ukrainian President Volodymyr Zelensky sees the extended range of Ukrainian combat drones as an important military boost for his country, which is under attack from Russia. “In these weeks, many have already seen that the Russian system of warfare has weak points and that we can reach these weak points with our weapons,” Zelensky said in his evening video message on Saturday in apparent reference to several successful attacks by Ukrainian drones on Russian refineries located far in the enemy’s hinterland. Three oil facilities in the Russian region of Samara on the Volga, more than 1,000 kilome…