Elon Musk took the spotlight at the Venice Film Festival on Tuesday. Well, not in person! But he and his influence took center stage as filmmaker Alex Gibney discussed his new doc, simply called Musk, during a press conference around lunchtime.The film about the owner of X and CEO of Tesla and SpaceX, world-premiering in the Italian fest's Venice Open -- Out of Competition program, comes from producers Jigsaw Productions (Gibney, Jessie Deeter, Erin Edeiken), Closer Media (Zhang Xin), Anonymous Content (Nick Shumaker, Jessica Grimshaw) and Double Agent (Dana O'Keefe)...A couple of questions focused on the tech mogul's support for...