Their first performance was in the school gym. They can now command the biggest arenas around the globe and the attention of world leaders.
John Wilson meets all four members of U2 in their Dublin rehearsal studio, where they reveal their working methods and guitarist The Edge demonstrates his distinctive sound. Singer Bono discusses his political activism, including his encounters with President Bush, while fellow band members Larry Mullen and Adam Clayton offer their own views on Bono's campaigning and consider how he balances his two careers.
Listen to the broadcast here.