"Bad" and "Pride (In the Name of Love)" were best left as incomplete "sketches", and he said that "The Unforgettable Fire was a beautifully out-of-focus record, blurred like an impressionist painting, very unlike a billboard or an advertising slogan." The melody and the chords to "Pride (In the Name of Love)" originally came out of a 1983 War Tour sound check in Hawaii. The song was originally intended to be about Ronald Reagan's pride in America's military power, but Bono was influenced by Stephen B. Oates's book about Martin Luther King Jr. titled Let The Trumpet Sound: A Life of Martin Luther King, Jr. and a biography of Malcolm X to ponder the different sides of the civil rights campaigns, the violent and the non-violent. Bono would revise the lyrics to pay tribute to King. "Pride" went through many changes and re-recordings, as captured in a documentary included on The Unforgettable Fire Collection video. "Pride" is the most conventional song on the album—Tony Fletcher of Jamming! magazine said at the time it was the most commercial song U2 had written—and it was chosen as the album's first single. On "Wire" Bono tried to convey his ambivalence to drugs. It is a fast-paced song built on a light funk drum groove. The song shows the influence of Talking Heads, with whom Eno had worked. Much of the song was improvised by Bono at the microphone. The ambient instrumental "4th of July" came about almost entirely through a moment of inspiration from Eno. At the end of a studio session, Eno overheard Clayton improvising a simple bass figure and recorded it "ad hoc" as it was being played. The Edge happened to join in, improvising a few guitar ideas over the top of Clayton's bass; neither knew they were being recorded. Eno added some treatments and then transferred the piece straight to two-track master tape—and that was the song finished, with no possibility of further overdubs. Bono tried to describe the rush and then come down of heroin use in the song "Bad". "Elvis Presley and America" is an improvisation, based on a slowed-down backing track from "A Sort of Homecoming", that takes the album's emphasis on feeling over clarity to its furthest extreme. Another song, "Indian Summer Sky", was a social commentary on the prison-like atmosphere of cities rather than living in a world of natural forces. The sparse, dreamlike "MLK"