Edmund Hillary
Sir Edmund Percival Hillary (20 July 1919 – 11 January 2008) was a New Zealand mountaineer, explorer, and philanthropist. On 29 May 1953, Hillary and Nepalese Sherpa mountaineer Tenzing Norgay became the first climbers confirmed to have reached the summit of Mount Everest. They were part of the ninth British expedition to Everest, led by John Hunt.
Yvette Vaucher
Vaucher and her husband joined an international expedition to Mount Everest headed by Norman Dyhrenfurth in 1971; she intended to become the first woman to reach the summit of Everest. Tensions and conflict were rife within the team, however, and the expedition was ultimately unsuccessful. Vaucher, upset with Dyhrenfurth's leadership, is said to have thrown snowballs at him before leaving the expedition.