"In addition to these international climbers, we were supported by a climbing team of Nepalese Sherpas, led by their Sirdar boss, Kami. Raised in the lower Himalayan foothills, these Sherpas know Everest better than anyone. Many had climbed on the mountain for years, assisting expeditions by carrying food, oxygen, extra tents, and supplies to stock the higher camps. As climbers, we would each carry substantial-sized packs every day on Everest, laden with food, water, cooker, gas canisters, sleeping bag, roll mat, head torch, batteries, mittens, gloves, hat, down jacket, crampons, multitool, rope, and ice axes. The Sherpas would then add an extra sack of rice or two oxygen tanks to that standard load. Their strength was extraordinary, and their pride was in their ability to help transport those life-giving necessities that normal climbers could not carry for themselves. It is why the Sherpas are, without doubt, the real heroes on Everest. Born and brought up at around twelve thousand feet, altitude is literally in their blood. Yet up high, above twenty-five thousand feet, even the Sherpas start to slow, the way everyone, gradually and inevitably, does. Reduced to a slow, agonizing, lung-splitting crawl. Two paces, then a rest. Two paces, then a rest. It is known as the "Everest shuffle."