Great moment.... I think this video is buried somewhere in the 4 disc set of R&H Outtakes, but I haven't watched them in a while I can't remember for sure. Anyway, came across this on youtube. Cool to see how much Bono gets into it...and then how the band kind of bum around toward the end when the choir goes a cappella.
YouTube - U2 I Still Haven´t Found Live from New York, Joshua Tree 87
YouTube - U2 I Still Haven´t Found Live from New York, Joshua Tree 87