Today on AirTalk, Vice President Kamala Harris has chosen Minnesota Gov. Tim Walz as her running mate. Also on the show, we dig into what exactly a Vice President does; we get a behind-the-scenes peek at how ‘The Simpsons’ became so good at predicting the future; we explore how false rumors ignited a weekend of violence in the UK; we check-in with the California legislature as they head back into session; and more.