The US and Japan have refused to recognize an air defense zone above tiny islands that China and Japan both claim. Today on River to River, we find out what is behind the dispute and what escalation would mean. Also, a look at how politics abroad are affecting politics at home, and whether our country's deeply divided political system could drive some areas of the U.S. to seek more independence. Host Ben Kieffer sits down with Iowa State University political scientists, Jim McCormick and Steffen Schmidt.