Doug Allan / Crossing a crevasse ladder in the Khumbu Icefall on Mount Everest Nepal. Model released. Freeze Frame book plate page 143.

Ernie Janes / Mount Everest landscape, Himalayas, Nepal. November 2014.

Ernie Janes / Mount Everest landscape, Himalayas, Nepal. November 2014.

Enrique Lopez-Tapia / Buddhist prayer flags in front of Mount Everest shrouded in mist, from Kala Pattar (5545 m). Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Sun on Mount Nuptse (7,860m) at sunset, Everest region, Sagarmatha NP, Khumbu, Himalayas, Nepal, October 2011

Patricio Robles Gil / Mount Everest (8,850m) at sunset, Sagarmatha National Park, Khumbu, Himalayas, Nepal, November 2007

Doug Allan / Abandonned drink can litter on the approach to Mount Everest Advanced Base camp (6,000m) Tibetan side of the mountain, April 2006

Doug Allan / Climbers trying out their oxygen equipment at Advanced Base Camp (6,400m) on Mount Everest, Tibet, May 2006

Doug Allan / Camerman Doug Allan filming on the Western Cwm of Mount Everest, Nepal, September 1992

Grant Dixon / Wind cloud over Mount Everest seen from Sagarmatha National Park, Nepal

Grant Dixon / Moon over summit of Mount Everest, Lhotse, and Nuptse as seen from Mount Pumori at sunset, Sagarmatha National Park, Nepal

Grant Dixon / Moon over summit of Mount Everest, Lhotse, and Nuptse as seen from Mount Pumori, Sagarmatha National Park, Nepal