This is exactly why you have proofreaders:
The Death Zone
Expedition organisers only learned of the avalanche after a group of climbers arrived back at the mountain's base camp on Saturday evening.
The mountaineers included Koreans, Pakistanis, Nepalis, Dutchman and Italians, reports say, but exact details remain unclear.
They at an altitude known as the Death Zone, where oxygen levels are not high enough to sustain life.
I keep writing all these really awful jokes here, but eleven people died doing something I will never attempt and I am trying to reconnect with the human race, so I keep deleting the jokes. The view must be amazing, and all the more so for the struggle.