GERMANY - JANUARY 09: Andreas Heinecke, chief executive and founder of Consens and founder of the company's Dialog im Dunkeln, or Dialogue in the Dark, exhibit, poses behind a stack of walking canes for the blind to be handed out to visitors to the company's exhibit in Hamburg, Germany, Tuesday, January 9, 2007. Visitors to the exhibition must navigate their way through pitch-black darkness with the help of a blind guide. (Photo by Adam Berry/Bloomberg via Getty Images)
