By Ari Rabinovitch
HAIFA, Israel (Reuters) – paralyzed for the past 20 years, former Israeli paratrooper Radi Kaiof now walks down the street with a dim mechanical hum.
That is the sound of an electronic exoskeleton moving the 41-year-old’s legs and propelling him forward — with a proud expression on his face — as passersby stare in [...]