Some economists want the government to automatically refinance homeowners to prevent further foreclosures. Joe Raedle/Getty Images hide caption

itoggle caption Joe Raedle/Getty Images

The SawStop saw can sense a slight electrical current that human fingers (and hot dogs) create. When it senses the current, the saw triggers a safety brake, which stops the blade in less than 5/1,000th of a second. Courtesy of SawStop hide caption

itoggle caption Courtesy of SawStop

At Expressway Toyota in Boston, co-owner Robert Boch says sales are rebounding thanks to loyal customers and big incentives such as zero percent financing. Chris Arnold/NPR hide caption

itoggle caption Chris Arnold/NPR