In many ways, U2 took their fondness for sonic bombast as far as it could go on War, so it isn't a complete surprise that they chose to explore the intricacies of the Edge's layered, effects-laden guitar on the follow-up, The Unforgettable Fire. Working with producers Brian Eno and Daniel Lanois, U2 created a dark, near-hallucinatory series of interlocking soundscapes that are occasionally punctuated by recognizable songs and melodies.