Director Alex Gibney on terrifying Musk documentary: 'It's not a funeral; it's a warning'

Alex Gibney's nearly four-hour, fire-and-brimstone documentary Musk — on tech oligarch, worlds-richest-man Elon Musk — is not uplifting. Instead, it is one of the most depressing and terrifying pieces of public media since An Inconvenient Truth alerted a mostly unaware public to its imminent annihilation by climate change.