NEW: U.S. Embassy Jerusalem issues a security alert.

INTELLIGENCE SUMMARY

NEW: U.S. Embassy Jerusalem issues a security alert. Americans in the Middle East should "exercise heightened vigilance" due to potential escalation, flight cancellations, and airspace closures. Iran and allied groups "may target U.S. interests overseas." Not an evacuation order — Israel remains Level 3 (Reconsider Travel). Softer than the Aug 1 alert which said "consider departing." Embassy tells Americans to download the IDF Home Front Command app, know nearest shelter, keep supplies