"We spent 10 minutes writing this next song, 10 minutes recording it, 10 minutes mixing it, 10 minutes playing it back and that has nothing to do with why it's called '40'."
- Bono, 1987, introducing the song '40'
did you know
The Unforgettable Fire album title is a reference to "The Unforgettable Fire"—an art exhibit about the atomic bombing of Hiroshima. The band saw the exhibit in November 1983 in Japan while on the War Tour.