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.
2007 Altitude Everest expedition
The 2007 Altitude Everest expedition, led by the American climber Conrad Anker, arrived at Base Camp below the north face of Everest in May 2007 and retraced the last journey of British climber George Mallory. On 8 June 1924, Mallory, along with his climbing partner Andrew Irvine, set out for the summit of Everest but disappeared from view short of the summit. The mystery of whether they could have been the first climbers to reach the world's highest point has never been resolved. Anker and his colleagues investigated what happened to them, testing out the durability of their clothing and equipment to establish whether Mallory and Irvine could have reached the summit in the conditions they faced in 1924.