In 1951, the 3rd French expedition to the Himalayas set out to conquer Nanda Devi (7,800 m). The attempt to cross the ridge between the main peak and Nanda Devi East resulted in the death of two members of the expedition. Expedition leader Roger Duplat and Gilbert Vignes disappear on the ridge somewhere below the main peak. Tenzing Norgay is part of a support team on this expedition; he and Louis Dubost climb Nanda Devi Est in search of the two missing people. A few years later, Tenzing discovered that Nanda Devi was the most difficult climb he had ever made.

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