Jobs rise in July, but low 'quit rate' tells another story

July was the sixth month in a row that the economy expanded by more than 200,000 jobs, with growth in a variety of sectors. But despite the good news, there may be other trends that tell a more troubling story, like the low number of people quitting jobs to find better ones -- a possible factor in U.S. wage stagnation. Economics correspondent Paul Solman reports.