Carl M. Bender, Ph.D., professor of physics in Arts & Sciences, delivered a talk, titled “Ghost Busting: Making Sense of Non-Hermitian Hamiltonians,” as a principal invited speaker at four international conferences this summer. The first conference was the 10th Claude Itzykson Meeting on “Quantum Field Theory Then and Now,” held in June at the Service de Physique Theorique de Saclay, near Paris, France. He delivered his second talk at the Third International Workshop on Pseudo-Hermitian Hamiltonians in Quantum Physics at Koc University in June in Istanbul, Turkey. It was the fourth international conference in the last two years that was devoted entirely to a research area that Bender began six years ago and still contributes to today. In July Bender participated in the International Conference on the Algebraic Analysis of Differential Equations from Microlocal Analysis to Exponential Asymptotics at the Research Institute for Mathematical Sciences at Kyoto University in Japan. And in August, he gave a five-hour presentation at the International Symposium of Complexified Dynamics, Tunnelling and Chaos at Ritsumeikan University in Kusatsu, Japan.