RUSSIA'S AIR DEFENSES ARE FAILING A TEST THEY WERE NEVER BUILT TO PASS Russia spent decades building one of the world's most formidable air defense networks. Ukraine is exposing its fundamental weakness. The problem isn't simply that Ukrainian drones are getting through. It's that Russia's air defense system was built for a different kind of war. Expensive radars. Sophisticated missile batteries. Layered protection around strategic sites. All designed around the assumption that a limited number of high-value threats could be detected, tracked, prioritized and intercepted. Then Ukraine changed the equation. Instead of relying only on aircraft and missiles, Ukraine built a long-range campaign of drones, decoys, shifting flight routes and repeated strikes on Russian infrastructure. And the mathematics became brutal. A relatively cheap drone can force Russia to fire an interceptor that costs many times more. A wave of incoming targets can stretch radar coverage, drain ammunition and force commanders to choose what to protect. An oil refinery? An ammunition depot? An airfield? A headquarters? Russia cannot protect everything at once. Its geography, long seen as a strategic advantage, is becoming an expensive liability. Radar coverage is limited by terrain and altitude. Interceptors have finite range. Crews need time to react. Even advanced systems become vulnerable when they must defend an enormous territory against persistent attacks from many directions. Ukraine doesn't need to destroy Russia's entire air defense network. It only needs to find the gaps, exploit them, and force Moscow to spend more and more defending its own territory. To be clear: Russian air defenses have not collapsed. Many Ukrainian drones are shot down. But repeated successful strikes show that Russia cannot guarantee the safety of its most important infrastructure. And that matters far beyond the physical damage. Every battery moved to guard a refinery is a battery missing somewhere else. Every interceptor fired has a financial and logistical cost. Every successful strike forces Russian planners to rethink their priorities. Here is the irony. Moscow invaded Ukraine expecting to demonstrate military superiority. Instead, it is defending facilities deep inside Russia against weapons built by the country it expected to defeat in days. Russia built its air defenses to survive a confrontation with NATO air power. Ukraine is testing them with something entirely different. The question is no longer whether Ukrainian drones can reach Russian territory. They can. The question is how much Russia will have to sacrifice to stop them, and how long it can afford to keep paying that price.