The Syrian Battlefield Is Getting Crowded

The U.S., Russia, President Assad's forces, the rebels and ISIS are just a few of the players involved in the conflict in Syria. The civil war is now more than four years old and it's no longer just a fight between the regime and the opposition.

What are the interests of all the players there now?

Here & Now's Peter O'Dowd talks with Chris Kozak, an analyst from the Institute for the Study of War.