Narrated by Paul Scofield.
One of the most highly praised documentaries of 1971: 'A brilliant, a candid, often icily beautiful, always humanely dramatic film,' said The Daily Telegraph.
Twenty-four climbers from 12 different countries tackled the highest mountain by its two most difficult routes.
When the attempt was eventually called off, seven of the climbers had walked out, 11 had been sent home with severe illness, and one - Major Harsh Bahuguna - was dead.