"It is very hard for him to come back home and say, 'Yeah, I'm normal.' He wants to climb on the table at 11 o'clock every night and try to perform! He's wondering where are the 50,000 people. We sort of laugh at it now."
- Ali, Bono's wife, after the ZooTV tour
U2 has sold approximately 50.5 million albums in the U.S., according to the RIAA, and upwards of 170 million worldwide.