Audi's night vision assistant, an example of how car companies are making cars that are part of drivers' digital lives. Courtesy of Audi hide caption

itoggle caption Courtesy of Audi

To teens today, cars aren't important in the same way they were in American Graffiti, the 1973 film directed by George Lucas. Lucasfilm/Coppola Co/Universal hide caption

itoggle caption Lucasfilm/Coppola Co/Universal

Employment Specialist Louis Holliday, right, helps an applicant file for unemployment at a Georgia Department of Labor career center last month in Atlanta. The jobless rate for African-Americans fell from 13.7 to 12.6 percent in July, but that's still twice the rate for whites. David Goldman/AP hide caption

itoggle caption David Goldman/AP

Woodward Avenue runs through Midtown, a Detroit neighborhood that is reviving in the midst of the larger city's decline. In the background is downtown Detroit. Carlos Osorio/AP hide caption

itoggle caption Carlos Osorio/AP