«David Mzee broke his neck in 2010. He was a college student in Zurich at the time, an athlete who enjoyed risk and contact, and he flipped off a trampoline and onto a foam pad. “The foam pad, it didn’t do its job,” he said.
Mr. Mzee, now 33, is one of three men who lost the use of their legs years ago after severe spinal injuries, but who now are able to walk without any supports, if briefly and awkwardly, with the help of a pacemaker-like implant, scientists reported...»