Defense Express reports.Warsaw is grappling with the financial toll of defending its skies against Russian drones, after recent interceptions highlighted how expensive the process has become. Polish fighter jets relied on AIM-9X and AIM-120 missiles—costing hundreds of thousands to several million dollars each—to destroy drones worth only a few thousand.Military experts and media note that while NATO forces used the weapons they had on hand, the cost imbalance makes it vital to explore cheaper tools. Alternatives under consideration range from upgraded anti-aircraft guns to specialized interceptor drones already tested in Ukraine.Polish defense companies have showcased systems like the ASSASIN interceptor drone, equipped with cameras, automated guidance, and an 8-kilometer range. Other low-cost options include hybrid anti-aircraft setups and even drones capable of dropping nets or using electronic warfare to disable targets.Defense analysts stress that Poland may also benefit from adopting Ukraine’s battle-proven methods and even partnering with Ukrainian firms. But experts warn that the bigger challenge will be securing government funding, as Poland’s defense spending has so far prioritized large-scale armament over anti-drone measures.Russian Shaheds in Polish airspace. BackgroundPolish Armed Forces’ Operational Command put air defense systems and aviation on highest alert due to Russia’s night attack on Ukraine: Russian drones violated the country’s airspace.As a result of a Russian attack on the night of September 10, drone debris fell on a residential building in a village in Poland’s Lublin Voivodeship. No one was injured.Ukraine's President Zelenskyy says Ukraine is ready to help Poland develop an alert and air defense system. Meanwhile, European Commission President von der Leyen announces the EU will build a “drone wall” on the Russia border.Ukrainian President Volodymyr Zelenskyy commented on the violation of Poland’s airspace by Russian drones, stating that Kyiv had warned Warsaw about the UAV movements.On Wednesday, September 10, NATO activated Article 4 of the North Atlantic Treaty after Russian drones violated Polish territory.Experts say the incursion of Russian drones into Polish airspace marks a dangerous new chapter in Russia's war against Ukraine, now stretching into its fourth year.