were mounted onto 4,500 separate aluminium tubes, which were then broken down into 187 foldable panels, spread across 22 columns, which would easily fit into two trucks. The set's public address (PA) system was initially designed by Fisher who proposed a monophonic system with speakers mounted on top of two large antler-like structures in front of the video screen. While discussing the structure to support the centralized PA system, Williams recalled a statement Bono made on the Zoo TV Tour about having a "secret fantasy to play a show underneath a set of gigantic golden arches". So the design was changed to feature a 100-foot (30-m) parabolic arch supporting the PA in the center of the stage. To further develop the concept, Fisher drew a version of the concert stage transformed into a supermarket, which later appeared in the Pop album artwork. While the set's overall design consisted of simply an arch in front of a sloped video screen, Williams wanted to incorporate a mirrorball into the set, which had previously been featured on both The Joshua Tree and Zoo TV Tours. Bono proposed that the mirrorball should be used as a vehicle in which the band would travel over the audience and onto the B-stage during the show, while making reference to the Parliament-Funkadelic spaceship. Williams took Bono's idea seriously, and suggested that the mirrorball should be lemon-shaped, a reference to U2's song "Lemon" from their album Zooropa. Fisher designed a 40-foot (12 m) motorized lemon mirrorball, which was placed on the right side of the stage. The final additions to the set included a 12-foot-wide (3.8-m) olive mounted onto a 100-foot (30-m) cocktail stick. Promotion Going along with the tour's satirical theme of consumerism, U2 announced their tour on 12 February 1997 by holding a news conference at a Kmart discount store in New York City. Hundreds of reporters from record companies, radio stations, television networks, newspapers, and magazines were in attendance at the conference, whose location was not revealed until the night before. Upon their arrival at the store, U2 got up on the stage assembled in the store's lingerie department, and performed "Holy Joe", a B-side from the "Discothèque" single, which had been released nine days prior. The entire event was broadcast live through various sources on television, radio, and the Internet. Following the performance, the band answered questions for a half-hour. On why retail was