Robin Santra is a professor of theoretical physics jointly appointed by DESY and the University of Hamburg. His accomplishments include the prediction of electronic hole dynamics and alignment in optical strong-field ionization, and predictions that motivated and supported the first experiments at the x-ray free-electron laser LCLS. He has been awarded the IUPAP Young Scientist Prize in Atomic, Molecular, and Optical Physics and has received the U.S. Presidential Early Career Award (PECASE). He is a Fellow of the American Physical Society. Abstract: I will present recent developments at the interface between attosecond science and x-ray science. In this context, I will discuss theoretical models of nonperturbative light-matter interactions and the performance of these models in comparison with experiment. The talk will be livestreamed from the ICTP website (ictp.it/livestream). Light refreshments will be served after the event.