The Association for the Advancement of Artificial Intelligence (AAAI) announced that CHAI PI Stuart Russell is the winner of the 2019 Feigenbaum Prize, and was awarded at the AAAI conference in Honolulu in January “in recognition of (his) high-impact contributions to the field of artificial intelligence through innovation and achievement in probabilistic knowledge representation, reasoning, and learning, including its application to global seismic monitoring for the Comprehensive Nuclear-Test-Ban Treaty.” The Feigenbaum Prize is awarded biennially to recognize and encourage outstanding Artificial Intelligence research advances that are made by using experimental methods of computer science.