How to Dismantle an Atomic Bomb is the eleventh studio album by U2. It was released on 22 November 2004 Much like their previous album, All That You Can't Leave Behind, How to Dismantle an Atomic Bomb exhibits a more mainstream rock sound after the band experimented with alternative rock and dance music in the 1990s. The album was produced by Steve Lillywhite, with additional production from Chris Thomas, Jacknife Lee, Nellee Hooper, Flood, Daniel Lanois, Brian Eno, and Carl Glanville. Looking for a more hard-hitting sound than that of their previous album, U2 began recording How to Dismantle an Atomic Bomb in February 2003 with Thomas. After nine months of work, the band had an album's worth of material ready for release, but they were not satisfied with the results. The group subsequently enlisted Lillywhite to take over as producer in Dublin in January 2004. Lillywhite, along with his assistant Lee, spent six months with the band reworking songs and encouraging better performances. U2 lead singer Bono described the album as "our first rock album. It's taken us twenty years or whatever it is, but this is our first rock album."