A Russian air base was attacked in Crimea. What does it mean for the war?

The World

A Russian air base was attacked in Crimea on Tuesday. While it is not yet clear exactly who was behind the attack, it marks an escalation in the nearly six-monthlong conflict between Russia and Ukraine.  To discuss what this moment means for the future of the war, The World's Marco Werman talks to Chris Dougherty, a senior fellow at the Center for a New American Security.