Excerpt: "I don't really have much time for escapist music that doesn't challenge anyone," U2's guitarist Dave "The Edge" Evans told our critic. "Our ambition is definitely to be appreciated by as many people as we can, but that doesn't compromise what we're trying to do musically. We have this image of sort of the perfect music -- it's something indefinable. We're always striving toward that goal. We haven't got there yet. But striving is important."