Tech billionaire Elon Musk is stepping back into the government fold, and this time he’s taking aim at the future of high-tech defense. Musk, who owns X, has landed a brand-new advisory role with the Pentagon to help guide the Trump administration on how advanced technology will reshape modern warfare.

Jason Dick talks with Alex Gibney about his new film “Musk,” a documentary about Elon Musk, the world’s richest man. It’s an exploration of how one person accumulated so much power — in the White House, over AI, space exploration, transportation, robotics and more — and asks the question: What will he do with it. […]