The article discusses the changing dynamics of defense spending in Europe, particularly in light of the Iran war and the lessons learned from Ukraine. It highlights the cost disparity between expensive interceptors like the Patriot and cheaper drones used by adversaries. The authors argue that Europe must invest in low-cost interceptor technology and develop offensive capabilities to counter threats from Russia, which poses a more significant risk than Iran. The piece emphasizes the need for strategic shifts in defense planning to avoid financial exhaustion and improve air defense effectiveness.