Elon Musk has urged major AI research groups and Chinese companies to run checks on other labs' systems. He delivered that message while some people in the technology industry are calling for a slowdown in AI work. Musk himself has put large sums into AI companies. Tesla stock fell following the speech. Musk also was listed at the top of Forbes' annual ranking of the wealthiest Americans. He brought up once more the idea of combining Tesla and SpaceX. Separately, reports say sexually abusive imagery of children continues on X, even though Musk promised to address the problem.