Dave Davies

The Dark Knight is the most successful film of the summer. Director Christopher Nolan and star Christian Bale can take much of the credit: They've revived a flagging franchise, offering a fresher, darker look at a legend.

Counterterrorism expert served for 30 years, under several presidents; he joins Dave Davies to discuss what he describes as a culture of mediocrity in U.S. national-security programs.

In 1964, Democrat Lyndon Johnson won the presidency in a landslide victory; eight years later, Republican president Richard Nixon was reelected in an equally lopsided race. In his new book, Nixonland, historian Rick Perlstein looks at the chaotic years between those elections.