Written by Cecilia Kang Elon Musk warned of civilizational risks posed by artificial intelligence. Sundar Pichai of Google highlighted the technology’s potential to solve health and energy problems. And Mark Zuckerberg of Meta stressed the importance of open and transparent AI systems. The tech titans held forth Wednesday in a three-hour meeting with lawmakers in Washington about AI and future regulations. The gathering, known as the AI Insight Forum, was part of a crash course for Congress on the technology and organized by Sen. Chuck Schumer, D-N.Y., the majority leader. The meeting — also attended by Bill Gates, a founder…