Elon Musk has called on top AI labs and Chinese companies to test each other's models. He issued the request while some in tech are asking for a pause in AI development. Musk himself has major AI investments. Tesla shares dropped after the appearance. Musk also was listed at the head of Forbes' annual ranking of the wealthiest Americans. He again raised his proposal to merge Tesla and SpaceX. In a separate development, reports say sexually abusive imagery of children continues on X, even though Musk promised to address the problem.