Everest: Beyond the Limit

Climbers quickly learn the dangers of the mountain when they hear about a Sherpa's condition.

As good weather approaches, hundreds of climbers at Advanced Base Camp prepare for the climb.

Russell splits the expedition into two teams for the five-day summit assault.

Fighting extreme conditions, the teams race against the clock as they run out of time and air.

Some climbers reach the top, but the mountain is so crowded, they get caught in a line to descend.

Struggling climbers suffer from "summit fever" and refuse to turn back with the summit so near.