NPR Podcast: Obstacles Hindering Retaking Raqqa and Mosul

Iraqi forces are slowly moving into the city of Mosul and they are facing fierce resistance from Islamic State fighters. Next door in Syria, local forces have just begun their own operations to recapture the city of Raqqa, the de facto capital of ISIS. NPR's Tom Bowman takes a step back and looks at the efforts by the United States to manage this massive operation. And he reports that while there are military challenges, the greatest obstacle could be coalition politics.