[ cheers and applause ] whose spirit is with the world. a group that's never had any problems saying how they feel. u2. >> when u2 play live aid, things had changed. rock and roll was getting serious. music could change the world. bono could change the world. ♪ sunday bloody sunday ♪ sunday bloody sunday >> u2, formed ten years ago when its members were still schoolboys is now arguably the hottest rock and roll band in the world. their last album "the joshua tree" lasso far sold more than 13 million copies worldwide. >> u2 somehow in the video age were still developing and becoming 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.