Now Playing: 8-13-13 Marketplace

The Department of Justice has blocked the American-U.S. Airways merger on anti-trust grounds. Why now? Speaking of setbacks, a cap on out-of-pocket costs that's part of the health care law has been delayed. Are Americans making more of an effort to make timely payments on their credit cards? The credit card delinquency rate is on the decline. Plus, the latest in our Conversations From the Corner Office series -- the CEO of Duke Energy discusses energy diversification. Also, stories on American exceptionalism and luxury housing for college students.