John L. Hopfield, Ph.D. (center), president of the American Physical Society, presents a commemorative plaque to Chancellor Mark S. Wrighton designating Washington University as a site of historical significance to physics. Looking on during the ceremony held last month in the Women‘s Building Lounge is John W. Clark, Ph.D., the Wayman Crow Professor and chair of the Department of Physics in Arts & Sciences. The designation recognizes WUSTL as the site of Arthur Holly Compton’s groundbreaking research on X-rays for which he received a Nobel Prize in 1927, the first for a WUSTL faculty member. Three talks about Compton, including a keynote address by Neal F. Lane, Ph.D., former director of the National Science Foundation, were given later that day in Crow Hall.