Following is a transcript of the video. Vanessa O'Brien: 26,000 feet or 8,000 meters, they do call the "death zone." The death zone is, you know, a part of what happens at height in the mountain.

Climbers at high altitudes are at risk because of the low concentrations of oxygen. The oxygen concentration where you live is probably much higher. What is the concentration of oxygen in the air ...

The lack of oxygen poses one of greatest threats to climbers who attempt to summit, with levels dropping to less than 40% when they reach the Everest “death zone.” The first target for ...

The movie is not an exact account of the ... At 29,032 feet (or 8,849 meters), Everest’s summit lies in the “death zone”— above 26,000 feet (8,000 meters). This is where the human body ...

After nearly a year of putting together this project on Everest, the thought of sending our climbers off for the last time onto the mountain is at once frightening and overwhelming. David ...

But if climbers want to summit Mount Everest, the tallest peak in the world at 29,029 feet (8,848 meters or 5.5 miles) above sea level, they have to brave what's known as "The Death Zone" - the ...

Two-part special following an extraordinary team of climbing doctors on an expedition like no other to make scientific history and experience the ultimate in mountaineering.