Saudi Arabia is requesting “hundreds more” missile rounds for its U.S.-supplied Patriot air-defense systems as it continues to wage a war against drones (as well as rudimentary cruise missiles) and ballistic missile attacks launched by the Iranian-backed Houthi forces based in neighboring Yemen. The diminishing Saudi missile stocks reflect the extent of the challenge facing The Kingdom, which recently sought to buy additional AIM-120 Advanced Medium-Range Air-to-Air Missiles, or AMRAAMs, to arm its fighter jets against some of the same threats.