the course of Achtung Babys recording sessions. While U2 were on the South American leg of their U2 360° Tour in March–April 2011, Guggenheim requested complete access to the band's archives in Dublin. To his surprise, they complied. While researching footage, the director was impressed by an unused Rattle and Hum video that he found, describing it as "rare and beautiful". Some of the footage included scenes of Bono throwing a tantrum in a dressing room and the band performing in a blues club. Guggenheim conducted the audio interviews with the band members that comprise much of the film while they were in Santiago, Chile. After their touring obligations in South America ended, the band met Guggenheim in Berlin for two days in May "to go back to the scene of the crime". They were filmed at Hansa Studios performing songs from the album and speaking to Guggenheim in lengthy individual interviews. Additionally, the group were filmed touring Berlin and driving a Trabant, an automobile that previously appeared in the album artwork for Achtung Baby and was incorporated into the lighting system of the Zoo TV Tour. The band expected a less personal treatment for the film and were at times uncomfortable with the extent to which Guggenheim probed into their history. Responding to the band's concerns, Guggenheim said, "I tell the story that's in front of me, warts and all. In the rock 'n' roll business, it's about adding layers. My process strips layers away. Rock stars are more comfortable creating an aura and mystique." Despite U2's discomfort, they allowed Guggenheim to have creative control over the film. He remarked, "They said from the beginning, we want you to make the movie that you want to make and they let me make the movie I wanted to make. It was pretty astounding. I think part of it is the trust we gained doing It Might Get Loud, they sort of let me have a free hand." Bono said that it was the least involved the band had ever been in a U2 project. Additional filming took place on May 27 at Burton Cummings Theatre in Winnipeg during the band's rehearsals for the Glastonbury Festival 2011. A rough cut of the movie was shown to the group in July, much to their satisfaction. According to Guggenheim, "They were over the moon. They loved it." The only request the band made