The U.S. military is experiencing a "beyond critical" shortage of advanced missile interceptors in Europe largely driven by President Donald Trump's war with Iran, a U.S. defense official in Europe and a NATO official told The Associated Press, raising concerns about vulnerabilities in NATO countries to a potential Russian attack. The U.S. defense official said the most concerning shortfall involves Patriot missile interceptors, which can shoot down Russia's high-speed ballistic missiles. The NATO official confirmed the low inventories of Patriots among American and NATO forces in Europe.