CNN The Lead With Jake Tapper April 18, 2014 20:40:00
Filmed such as "into thin air" about the 1996 tragedy that left eight climbers dead. the dramatic scenes, perhaps, adding to the allure that has changed the dangerous mountain into a tourist destination but as the altitude increases, reality sets in. >> you can breathe for a while. you're sort of losing ground as you do without oxygen. >> reporter: in 2012, american joe pratt struggled with the lack of oxygen at such a high he have lags, though he survived. >> everyone who climbs mt. everest and survives is lucky. >> 444 have been approved to climb this year guided by sherpas. coming up, she...