Book claims missing Everest climbers had problems with oxygen tanks

The Everest climbers who disappeared on a mission 100 years ago had problems with their oxygen tanks, a new book has claimed.

George Mallory, 37, and Andrew 'Sandy' Irvine, 22, went missing during their 1924 expedition to climb the world's tallest mountain.

Mallory's body was discovered 2,000 feet from the summit in 1999, but the body of his climbing partner has not been found.

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