Robots: Ralf Hutter, Henning Schmitz, Fritz Hilpert, and Stefan Pfaffe of the band Kraftwerk perform during the Kraftwerk — Retrospective 1 2 3 4 5 6 7 8 at The Museum of Modern Art on April 10, 2012 in New York City. Mike Coppola/Getty Images hide caption

itoggle caption Mike Coppola/Getty Images

Ralf Hutter (left) and the other members of Kraftwerk in performance at the Museum of Modern Art in New York on Tuesday. Peter Boettcher/Courtesy of MoMA hide caption

itoggle caption Peter Boettcher/Courtesy of MoMA
Courtesy Michael Jonzun and Dennis Ackerman