Rafael Henrique | Lightrocket | Getty ImagesPARIS, France — U.S. technology giants this week have talked up the benefits of artificial intelligence for humanity, turning on the charm at one of Europe's largest industry events as regulators globally work to curb the harms associated with the tech. At the Viva Tech conference in Paris on Wednesday, Amazon Chief Technology Officer Werner Vogels and Google Senior Vice President for Technology and Society James Manyika spoke about the great potential...