U2 Live In Las Vegas - How Tech Enables Band To Shake Up Sphere Sets

www.forbes.com: Following the worldwide success of The Joshua Tree and Rattle and Hum albums in 1987 and ‘88, which combined to sell 40 million albums around the globe, the group still managed to take a creative leap forward with 1991’s Achtung Baby, with the ensuing Zoo TV world tour helping drive sales of the album near 20 million.