The problem is that the technologies of war are constantly changing. Just a year ago, Russia launched about 400 Shahed drones per month, most of which were shot down by mobile units with heavy machine guns. Today, in a single night, the Russians can launch twice as many, and machine guns often simply cannot reach the necessary altitude."Therefore, the European 'drone wall' planned for 2025 may quickly become obsolete. If it remains static and is not upgraded alongside the modernization of Russian drones, it will not be able to fully protect European cities."It is worth emphasizing once again that the only realistic option is to build the 'drone wall' not on the Polish border, but hundreds of kilometers further east. The best guarantee for the safety of Polish, Slovak, or German airspace will be Ukrainian technologies, reinforced by Europe’s best scientific base. They will be able to cheaply and effectively shoot down anything coming from Russia.The Great Wall of China did not save China from the Mongols and Manchus. The Roman limes did not protect the empire from the Germans. Similarly, the European 'drone wall' — if it is not constantly modernized and tested in real conditions — will sooner or later turn into an outdated playground with 'toy airplanes.'SourceAbout the author. Mykola Kniazhytskyi, journalist, Member of the Ukrainian Parliament.The editorial team does not always share the opinions expressed by blog or column authors.