How the Navy came to protect cargo ships

The Genco Picardy is not an American ship. It doesn't pay U.S. taxes, none of its crew are U.S. nationals, and when it sailed through the Red Sea last month, it wasn't carrying cargo to or from an American port. But when the Houthis, a tribal militant group from Yemen, attacked the ship, the crew called the U.S. Navy. That same day, the Navy fired missiles at Houthi sites.On today's show: How did protecting the safe passage of other countries' ships in the Red Sea become a job for the U.S....