A versatile technology that can spot cracks in space shuttle foam, while also offering the potential to see biological agents through a sealed envelope and detect tumors without harmful radiation, will be the focus of a full-day symposium at the 230th national meeting of the American Chemical Society in Washington, D.C. The session will be co-chaired by T-ray experts Xi-Cheng Zhang, a physicist and engineer at Rensselaer Polytechnic Institute, and Charles Schmuttenmaer, a chemist at Yale University.