Fei-Fei Li, chief scientist at Google's cloud-computing division, is leaving after controversy over the use of the company's artificial intelligence technology and a deal with the Pentagon. Li, a venerated researcher in the field of AI, is returning to Stanford University, where she was a professor before joining Google about two years ago. Andrew Moore, dean of the school of computer science at Carnegie Mellon University in Pittsburgh will become head of AI at Google Cloud at the end of 2018, the Alphabet Inc. company said Monday. Moore worked at Google from 2006-2014. In early June, Google retreated from a Pentagon cloud contract following employee protests.