U2 remain one of only two major rock bands that still have their original lineups. Aerosmith is the other. But Bono says it hasn't always been easy keeping it together. He said, "I’m amazed we’re still going. Being in a band is tricky. The older you get, it gets even trickier, because when you grow up together…the male loves to be the lord of his own domain, you know? And you can just imagine why people say, ‘Ah, f**k this, I’m outta here.’" Bono added the band is always breaking up: "It’s the truth. Then we get back together and I’m grateful we do.” Their next album, "Songs of Surrender", is a collection of 40 re-recordings of some of their classic songs and will be out in March.