U2 was going to perform in Jimmy Fallon for the entire week. But, as Fallon explains in this video, Bono broke an arm this weekend and they had to cancel. Amazingly enough, he and the Roots filled in and performed Desire—one of U2 best songs, from the 1988 Rattle and Hum. It was as good or better than the young U2.
It's really hard to get to this level of perfection in such short notice, so kudos to Jimmy and the Roots. You can buy the original Desire here.