U2 wrapped up their “Joshua Tree” tour – which commemorated the 30th anniversary of the band’s classic album – in October of this year. In a new in-depth interview with Rolling Stone, frontman Bono admits that revisiting the album on-stage was a challenge.

“The stance that we took was [to act] as if we had just put out The Joshua Tree the week before,” he said. “So there were no old Super 8 films or anything to give the sense of that time. We felt that its strength was that it had meaning, maybe even more meaning now than it did then. That was the conceit, and it got better and better. We ended with four nights in Sao Paulo, in front of, I think, nearly 300,000 people, and it was quite the crescendo.”

Bono continued: “But … I haven't quite recovered from it … Stepping inside the songs was more of an ordeal than I thought it would be. They are very demanding in terms of their emotional – what word am I looking for … forthrightness. And then we were preparing for Songs of Experience. All that promotion takes a lot more work than I remember, but if you believe in the songs, you have to defend and present them.”

U2 will hit the road again beginning May, for their Experience + Innocence North American Tour. For more information, including cities and dates, visit the band’s official website.