On the morning of Tuesday, September 11, 2001, four commercial airliners were hijacked above the US by the militant Islamist terrorist group al-Qaeda. What followed was the deadliest terrorist attack in history. Twenty years on, Dominic Sandbrook and Tom Holland look back at the events and discuss their impact.A Goalhanger Films & Left Peg Media productionProduced by Jack DavenportExec Producer Tony Pastor*The Rest Is History Live Tour 2023*:Tom and Dominic are back on tour this autumn! See them live in London, New Zealand, and Australia!Buy your tickets here: restishistorypod.comTwitter: @TheRestHistory@holland_tom@dcsandbrook Learn more about your ad choices. Visit podcastchoices.com/adchoices