"You write a song because something hurts. I mean if you look at social change within America, that came from the Delta areas, the plantations or wherever. A lot of the change in America is rooted in blues music; that was what people listened to. It was the protest music of the time."
- Adam Clayton
The song 'Zoo Station' is about the Zoological Gardens in the middle of Berlin, which was a train station and hangout for "societies' undesirables".