"Bono was on fire with lyric and song ideas. His singing had reached a whole other level as if some spirit has entered his body pushing him into uncharted falsetto territory."
- Daniel Lanois on recording Achtung Baby
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.