Good morning. Investors are getting jittery about AI spending again. Tesla shares closed down 15% and Alphabet stock closed down 7% yesterday after both companies indicated that their eye-watering, AI-driven capital expenditure commitments would exceed initial estimates through the rest of the year. Not that their top executives didn’t try to calm fears. “I’m confident that all the things that we’re investing in will yield incredible returns,” Tesla CEO Elon Musk told investors yesterday. (They didn’t bite: It was the electric automaker’s worst market day in more than a year, with a $215 billion shave to its market cap.) Expect the pressure to continue, even as revenue predictions look up. To channel Dickens: Great expectations. More tech news below; have a wonderful weekend. —Andrew Nusca P.S. Overnight, the Trump administration replaced a global 10% duty with duties on 80-odd nations ranging from 10% to 12.5%. Three months before midterm elections in the U.S., yes, Virginia, we’re still talking about tariffs. Want to send thoughts or suggestions to Fortune Tech? Drop a line here. U.S. lawmakers introduce ‘AI Kill Switch Act’ Who should have the power to shut down artificial intelligence that gets out of hand? According to U.S. legislators, the federal government. A new bipartisan bill introduced in the House on Thursday would grant the Department of Homeland Security the authority to order private AI firms to slow or altogether stop AI models the government deems capable of causing “catastrophic harm.” Dubbed the “AI Kill Switch Act,” the legislation would require designated developers to maintain the technical ability to “throttle, suspend, or fully shut down” a given AI system, establish a response framework for such a situation, and require incident reporting and record preservation to learn from an incident. “AI is going to keep advancing, and it should," said Congressman