Elon Musk is pressing major AI research groups and Chinese companies to cross-test their systems. He delivered that message while some people in the technology industry are asking for a pause in AI development. Musk himself holds big stakes in AI ventures. Tesla shares slid after his remarks. Musk also was listed at the top of Forbes' annual ranking of the wealthiest Americans. He brought up once more the notion of joining Tesla and SpaceX. In a separate development, reports say sexually abusive imagery of children persists on X, even though Musk committed to fixing it.