"Love, in the highest sense of the word, is the only thing that you can always take with you, in your heart. At some point you are going to have to lose everything else anyway."
- Bono on his inspiration for Walk On
did you know
In late 2004, "Mercy", an unreleased track taken from the How to Dismantle an Atomic Bomb sessions, surfaced on the Internet through a fan who had been given a copy of the album containing the extra track. The track is of less than standard audio quality, but managed to become a favorite on fan websites.