SITUATION EXPLAINED: Jamie Dimon is assembling a 40-company alliance to tackle AI risk. • He's personally called CEOs of major and regional banks and IT companies, expanding the Alliance for Critical Infrastructure, which JPMorgan co-founded with Mastercard and Berkshire Hathaway Energy • Outreach started in July and now spans over 40 companies across financial services, energy, water, utilities, telecom, airlines, and railroads • The aim: a shared understanding of how AI is used, the risks it…