Govs. Haley Barbour of Mississippi (from right), Gary Herbert of Utah and Deval Patrick of Massachusetts prepare to testify on Capitol Hill. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images

Despite the "not for consumption warning," the DEA has banned the sale of products like K2, which contain herbs and spices sprayed with a synthetic compound chemically similar to THC, the psychoactive ingredient in marijuana. Kelley McCall/AP hide caption

itoggle caption Kelley McCall/AP

Consider all the child's symptoms, not just temperature. hide caption

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Michael Wand of the Cognitive Systems Laboratory at the Karlsruhe Institute of Technology in Germany demonstrates a technology that recognizes speech through muscle activity in the face rather than sound. Gretchen Cuda for NPR hide caption

itoggle caption Gretchen Cuda for NPR

An X-ray of Schneider's right femur (thighbone), which broke suddenly as she was standing on a New York subway train. Courtesy of Dr. Jennifer Schneider hide caption

itoggle caption Courtesy of Dr. Jennifer Schneider