zone. can you talk about conditions there because you're already dealing with one-third of the oxygen that you would get at sea level. >> that's right. we call any part of the mountain above 26,000 feet, we call the death zone and that's because humans aren't meant to exist there, so even when using bottled oxygen and supplemental oxygen there's only a certain number of hours that we can actually survive up there before our bodies start to shut down, and so that means if you get caught in a traffic jam above 26,000 feet and you can't get to more oxygen or can't get down to thick airport consequences can be really severe, obviously ultimately death. >> adrianne, how did this happen, because there is communication from that so-called death zone down to base camp, et cetera? >> sure. >> i don't get to how we goat a point where so many more people were allowed to go up or the green light was given that, objection you can climb now