A.M. Edition for Mar. 17. Israel says it killed Iran’s security chief, Ali Larijani, in airstrikes last night on Tehran, according to defense minister Israel Katz. Oil and natural gas prices are rising after an overnight drone strike and an attack today on a tanker off the Emirati coast. Plus, Nvidia has unveiled a suite of new hardware geared toward running AI models more quickly and efficiently. And WSJ’s Sam Schechner on why OpenAI has been weighing the rollout of a controversial “adult mode” of ChatGPT. Luke Vargas hosts. Sign up for the WSJ’s free What’s News newsletter. Learn more about your ad choices. Visit megaphone.fm/adchoices

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“What did the council decide on item 42?” — answered with the speaker and the moment.