Climb every mountain

Sixty years ago

"There's an underlying feeling among the Sherpas that they've been treated quite badly by westerners and that clients don't have any respect for them. If you look around at how incredibly luxurious some base camps are, you can see their point," he said.

"It's not that we pissed them off and there was a fight. This is 10 or 20 years of frustration spilling out. Mob rule shouldn't happen anywhere, let alone Everest, but something needs to change."

"That's the issue that everyone at base camp will now have to resolve. They'll have to listen to the Sherpas. I don't know how this will affect Everest. Part of me thinks the show will always go on. The only way things will change is if the money stops coming in."

Jon Griffith, British climber and leader of an expedition that has left Mount Everest after being attacked by a large group of Nepalese sherpas.