Ahead of attending U.S. Senate Majority Leader Chuck Schumer's AI Insight Forum alongside Mark Zuckerberg, Elon Musk and Bill Gates, the co-founder & Executive Director of the Center for Humane Technology, Tristan Harris, told CNBC's Tania Bryer backstage at the 2023 CogX Festival about his fears over the "AI arms race" and the need for international regulation.