‘Catastrophic is becoming an understatement,’ aid groups lament as new Yemen battle begins

The Saudi-led coalition that supports Yemen's government has begun an operation to retake the vital port city of Hodeidah, currently controlled by Houthi rebels who are aligned with Iran. Aid groups sounded alarms over the new escalation in the bloody proxy war, already the world's largest humanitarian crisis. Jeffrey Brown learns more from Gregory D. Johnsen of the Arabia Foundation.