"40", also known as "40 (How Long)", is the tenth and final track from U2's 1983 album, War. The song is noted for its live performances, often involving the audience singing along for minutes after the band has left the stage. The lyrics are a modification of the Bible's Psalm 40.
The song did not get a commercial release. It was, however released as a promotional single only in Germany, simply to promote U2's appearance at the Loreley Festival… read more