"We're a band from the north side of Dublin called U2," said Bono as an introduction. "This is the first time we've played this song in about 20 years."

Last played live in December of 2005, the single from "October" was the second song of the third night of a five-night residency at the United Center as part of the group's "Innocence + Experience" tour.

Following their Chicago stop, U2 will play two dates in Toronto and four in Boston before wrapping up the current North America leg with an 8-show run at New York's Madison Square Garden.