"It's a sort of three year cycle. We spend like a year writing the songs, then a year recording them, and then a year selling them door to door." - Bono, 2009
did you know
During the ZooTV Tour U2 introduced a new stage concept called the B-stage. It allows for more intimate and stripped-down performances of songs, later used by Aerosmith, Bon Jovi and Coldplay amongst others.