Seeing below the surface: Engineers devise a new way to inspect advanced materials used to build airplanes

Seeing below the surface: Engineers devise a new way to inspect advanced materials used to build airplanes: "Brian L. Wardle, associate professor of aeronautics and astronautics and his colleagues have devised a new way to detect that internal damage, using a simple handheld device and heat-sensitive camera. Their approach also requires engineering the composite materials to include carbon nanotubes, which generate the heat necessary for the test."