"Some of the ideas we started out with on Achtung Baby started to come into focus on the tour as we played around with the new stage set, the TV screens, the whole concept of a TV station on the road. It struck a chord in us and the music that came out on Zooropa was very influenced by the tour. Normally it's the other way around; you put an album together and then you go off on the road and you're drawing from the album for your inspiration."
- The Edge
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.