Saudia Arabia intercepted a Volcano 2-H ballistic missile fired from Yemen by Iranian-backed Houthi rebels, who confirmed the intended target was Yamama Palace, where King Salman chairs weekly government meetings. Last month, the Yemeni rebels—who have declared a “new chapter” in their confrontation with the kingdom—fired a similar projectile towards Riyadh’s international airport, which also was intercepted by the U.S.-made Patriot defense system. One week ago at the United Nations, Ambassador Nikki Haley displayed what she said was “undeniable” evidence that Iran was supplying the Houthis with the missiles. A Saudi-led coalition of Sunni nations has been at war with the Shiite rebels since intervening militarily in Yemen in March 2015. The Houthis, however, remain in control the capital Sana’a and have forced into exile the internationally-recognized government of President Abed Rabbo Mansour Hadi. Earlier this month, tensions skyrocketed when the rebels killed former Yemeni strongman Ali Abdullah Saleh, after he switched alliances and attempted to strike a deal with the House of Saud. The conflict in Yemen has killed more than 10,000 civilians and driven millions to the brink of starvation.