Iran's upgraded Kheibar Shekan ballistic missile is emerging as a growing challenge for U.S. missile defenses. Military assessments say the IRGC's solid-fuel missile, equipped with a manoeuvrable re-entry vehicle and road-mobile launchers, is designed to complicate interception by Patriot, THAAD and Aegis systems. Analysts warn Iran's evolving missile tactics, underground missile bases and coordinated salvo launches could strain U.S. interceptor stockpiles and reshape the regional missile balance. Watch for the latest updates on Iran, the IRGC, Kheibar Shekan, U.S. missile defense, Israel, THAAD, Patriot, Aegis, Middle East tensions and regional security.