Why the Houthis are hard to defeat

Yemen's Houthi militants are backed by Iran. But as Israel and the US ramp up strikes on Houthi strongholds in Yemen, the militants continue to hit targets inside Israel and threaten international shipping in the Red Sea. Host Carolyn Beeler speaks with Brian Katulis, a senior fellow at the Middle East Institute, about the challenge of neutralizing the Houthi threat.