"We took over this little hotel, that they call a riad, and set up the gear in the courtyard. So it was open, a square of sky over our heads. You can hear the call to prayer, birds flying around. Two swallows came back regularly to shit on Larry's drums."
- Bono describes the album sessions in Fez, Morocco in the summer of 2007.
The song 4th of July is named after the date of birth of Edge's first daughter. It was recorded by accident, Adam was playing some bass lines and Edge just jumped in, both unaware that Brian Eno was recording.