"The song Iris deals with some kind of transference of the female energy because the way I would look at women, from the point I met Ali, was forever changed. It's a big moment, at puberty, you're just discovering girls and this women who brought you into the world leaves you, abandons you. And you think it's your fault, because that's something that kids do. But, of course it's not"
- Bono on Iris
Starting from Summer 2007 to Summer 2008, U2 had written and recorded 50-60 songs for a new record with Brian Eno and Daniel Lanois. 11 of these were released on 2009's No Line On The Horizon.