Analyses from multiple outlets report that U.S. stockpiles of advanced missile interceptors have been substantially reduced since renewed fighting between the United States and Iran began in late February. One outlet, citing a think tank estimate, says the number of Patriot interceptors has fallen by about 65%—with the most advanced interceptor inventories reduced significantly as exchanges continue. Another report similarly states that the U.S. has used up roughly two-thirds of its critical Patriot missile interceptors, describing the reduction as occurring over the period since hostilities resumed on or around Feb. 28. A separate analysis characterizes the situation as a risk to U.S. and allied air-defense readiness, arguing that diminished inventory levels could force changes in operational planning, including taking more conservation measures to manage limited interceptor stocks. While the specific figures vary in how they are presented, the sources converge on one core point: combat activity between the U.S. and Iran is consuming a large share of existing interceptor supplies, leaving fewer interceptors available for future engagements. The reports do not identify a corresponding increase in interceptor production in the same timeframe.