A trader on the floor of the New York Stock Exchange looks at stocks during the final minutes of trading on May 6. The Dow fell more than 600 points in a few minutes in what became known as the "flash crash." Timothy A. Clary/AFP/Getty Images hide caption

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Retired cosmetics executive Mark Goldsmith, who runs the nonprofit Getting Out and Staying Out, gives inmates tips about how to handle job interviews. "People usually make up their minds in the first 30 seconds or minute," he says. Jim Zarroli/NPR hide caption

itoggle caption Jim Zarroli/NPR