U.S. and Israeli missile defence systems are facing a growing interceptor crisis, with a Royal United Services Institute report warning that Arrow-3 stocks could run out within days, while THAAD inventories may last only weeks. After firing over 11,000 munitions worth $26 billion, rapid depletion is exposing limits of high-intensity warfare. Analysts say shortages could drive diplomatic moves by Donald Trump, as the war increasingly becomes a test of industrial endurance rather than battlefield dominance.