What are the worst Everest tragedies?

There have been many films and documentaries about the thrill and struggle of climbing Everest and with social media it has become an ever more popular destination.  Just this year a French youtuber has broken audience records for his film ‘Kaizen’ about his challenge that he made to conquer Everest in just one year. 

Over the past century, over 340 climbers have died on its peaks, with 2015 being the deadliest year with 22 fatalities. Most deaths result from avalanches, falls, and mountain sickness, which occurs at high altitudes due to low oxygen levels and can cause fatal brain or lung e...