In Yemen a rebel movement of Shia Islamists has been firing missiles at commercial shipping in the Red Sea, provoking several rounds of U.S. airstrikes in retaliation. Few Americans know much about the Houthis, who go by the formal name of Ansar Allah or "Defenders of God." The Houthis seized control of Sana'a in 2014, leading to years of catastrophic war once Saudia Arabia intervened to try to restore the ousted government. Today, this relatively small militia is disrupting global shipping, as cargo ships have been forced to avoid the strait at the mouth of the Red Sea on the way to the Suez Canal. In this episode, Eurasia Group analyst Gregory Brew discusses the Houthis' motives and the impact of their missile attacks on the geopolitics of the region.