TOPSHOT - Swiss German-born disabled athlete Silke Pan (C) walks with her powered exoskeleton "Twiice On" at The Swiss Federal Institute of Technology (EPFL) during a press preview in Lausanne on November 6, 2018. - Following the 2016 Cybathlon Championships in Kloten and two years of development the team of high engineers and researchers introduced a new powered exoskeleton, more efficient, more ergonomic and finer that can now be used independently. (Photo by Fabrice COFFRINI / AFP)