@afp: Elon Musk's lawyers have put the makers of a new four-hour documentary about the multibillionaire on formal legal notice days before its premiere, warning that the film defames him. The letter addressed to a producer at Alex Gibney's Jigsaw Productions, accuses the Oscar-winning documentarian of building "Musk" around a predetermined conclusion. It also says Gibney refused to fact-check the film with the world's richest man or the people close to him. 🎥 Archana Thiyagarajan, Jessica Howard-Johnston, Luca Prizia