Cai Guo-Qiang: I Want To Believe February 22–May 28, 2008 “Right now, Cai Guo-Qiang is one of the most powerful artists operating in the world, and this retrospective at the Guggenheim is designed to make that point,” says former Guggenheim Director Tom Krens. For further information about the exhibition, visit Cai Guo-Qiang: I Want to Believe.