After being paralyzed for the past 20 years, Radi Kaiof began to walk down a street in Israel to the sound of a dim mechanical hum. That was the sound of an electronic exoskeleton, developed by a small Israeli high-tech company, propelling the 41 year old paraplegic down the street with a proud expression on his face. The device, called ReWalk, is the brain child of engineer Amit Goffer, founder of Argo Medical Technologies.08/26/08