"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
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.