CNN security analyst Peter Bergen on his new book, All The Presidents' Wars

About this episode

Twenty-five years ago, the September 11 attacks became the deadliest assault on American soil since Pearl Harbour. The wars that followed cost trillions of dollars and hundreds of thousands of lives. Twenty years after the invasion of Afghanistan, the Taliban took back the country, and America's standing has taken a heavy hit. Peter Bergen, CNN's national security analyst, has reported from the Middle East since the 1990s, and is one of the few journalists to have interviewed Osama bin Laden. His new book, 'All the Presidents' Wars', examines how Bush, Obama, Biden and Trump responded to 9/11. He spoke to Guyon Espiner.