books.google.ca - When Jon Krakauer reached the summit of Mt. Everest in the early afternoon of May 10,1996, he hadn't slept in fifty-seven hours and was reeling from the brain-altering effects of oxygen depletion. As he turned to begin the perilous descent from 29,028 feet (roughly the cruising altitude of an Airbus...http://books.google.ca/books/about/Into_Thin_Air.html?id=gt7EQgH8-b4C&q=Makalu&utm_source=gb-gplus-shareInto Thin Air
