♪ sunday bloody sunday ♪ >> u2, formed ten years ago when its members were still schoolboys-s now arguably the hottest rock and roll band in the world. their last album "the joshua tree" has so far sold 13 million copies worldwide. >> u2 somehow in the video age were still developing and become a great band and maintaining that kind of connection with people and not getting the message lost in the medium. >> we spent the last ten years finding out how to be in u2. we'll spend the next ten years seeing what u2 can do.