“Concentration, the meditative side, refocusing…” The extreme tightrope walker Nathan Paulin tells his passion

The tightrope walker has just traversed 620 meters above a dizzying void, barefoot on a 2.5 cm wide strap. This March afternoon, sitting on a narrow metal platform at the top of a 108 m high wind turbine, Frenchman Nathan Paulin catches his breath and his spirits while enjoying a breathtaking panorama of the Swiss Jura mountains.