and imagine what top climbers might be doing 60 years from now. “I hate to think,” he says, but mentions the Swiss climber, Ueli Steck, who fled the mountain in April following what Cool terms “an altercation” with a crowd of Sherpas at Camp 2. Steck, he says, was planning to climb Everest’s west ridge, first done in 1963, descend to the South Col and then immediately climb Lhotse via a new route, all without fixed ropes. “Ueli had been training like a machine,” Cool says. “He’s a climber in a class all his own. He’s technically brilliant but he had also taken his physical condition to an astronomic level. It would have been amazing to see what he could have done.” What tourism will look like is another matter. One clue is in the stunning helicopter rescue performed by Simone Moro, Steck’s climbing partner, whose intemperate language provoked the confrontation at Camp 2. Moro flew back to Everest on Tuesday at the controls of a high- powered helicopter to rescue a stricken climber at an altitude of 7,800 metres. It was the highest rescue yet performed on Everest and highlights the exponential rise in helicopter flights in recent years. By 2073, the infrastructure on the mountain could include a helipad on the South Col, bringing tourists breathing bottled oxygen. In the meantime, they are transforming the potential for rescuing both climbers and the