When U2 announced its 2017 tour celebrating the 30th anniversary of The Joshua Tree, the itinerary revealed that the Bonnaroo Music & Arts Festival had landed the Irish band’s first-ever (and only) U.S. festival appearance. By live music standards, it was the biggest get of the festival season—rivaled only by Beyoncé’s since-canceled headline appearance at Coachella—in a critical year for the…
