a line of climbers working their way through the Khumbu ice fall on Mount Everest

Traffic jams are just one of the problems facing climbers on Everest

As the last teams leave the mountain, alpinists and pundits argue about how and why things went awry; exclusive new photos

Climbers line up to move through the Khumbu Icefall, one of the most dangerous sections alpinists must traverse when attempting Mount Everest.

Photograph by Mark Fisher, National Geographic

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