If you dont want to know how easy it is for a canny individualor a malicious state actorto hack into the electronic voting technology used in the U.S., dont watch Kill Chain: The Cyber War on Americas Elections. In this unnervingly persuasive HBO documentary, directors Simon Ardizzone, Russell Michaels and Sarah Teale marshal cyber-security experts, statisticians and lawmakers to expose cracks in the system that could easily allow hackers to affect voting results. The filmmakers sources also include actual hackers, among them an individual who breached Alaskas voting system in 2016 just to see if he could. Although he explains in an on-camera interview (his face obscured to protect his identity) that he declined to alter any data, he says he could have sold his backdoor access for millions.