In 1975, four teenagers gathered in a kitchen in Dublin to discuss forming a band. The drum kit just about fit into the room, the lead guitarist had a homemade guitar, the bassist could barely play at all and nobody wanted to sing. Over thirty years later, they are still together, bound by intense loyalty, passionate idealism and a relentless belief in the power of rock and roll to change the world. U2 have sold over 130 million albums, revolutionized...