A.M. Edition for June 4. The leaders of OpenAI, Anthropic, and Google DeepMind are calling on Congress to pass a law protecting against biological threats posed by AI. Plus, a flesh-eating screwworm has arrived in the U.S., creating a headache for U.S. ranchers and livestock producers. And the Journal's Douglas Belkin explains why college professors are urging schools to reinstate entrance exams after years of looser policies. Luke Vargas hosts.

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