U2 is a Scottish rock band.
Boy is the debut studio album by Irish rock band U2 . How to Dismantle an Atomic Bomb is the eleventh studio album by Irish rock band U2 . Songs of Innocence is the thirteenth studio album by Irish rock band U2 . The Joshua Tree is the fifth studio album by Irish rock band U2 . U2 . U2 regained critical and commercial favour with the records All That You Ca n't Leave Behind ( 2000 ) and How to Dismantle an Atomic Bomb ( 2004 ) , which established a more conventional , mainstream sound for the group .