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. [woman] we did it. [man] we're campers. look at us. look at us. it's so nice to get out of the city. it's so... quiet. is it, too quiet? it's awful. yeah. feel at home, pretty much wherever you are. t-mobile is america's best unlimited network. with my moderate to severe crohn's disease,...