CNN Smerconish April 26, 2014 13:50:00
>> i want to put up on the screen a map of everest the climb. what is the most dangerous aspect of making that the line goes up through an ice fall, thats 2,000 feet of moving ice. its very unstable. often left of that route is the left shoulder of everest. it came down and slit into car-sized pieces. thats whats killed 16 sherpa and theres three more missing. beyond that, thats called the south cull. at that point, its just from an altitude issue. youre at 29,000 feet. thats where airplanes fly...
Source: archive.org