The worst turbulence I have ever experienced was on an Aden Airways DC3 in 1958 flying from Aden to Nairobi. A member of the cabin crew was walk up the aisle with a tray of cups in one hand and a coffee pot in the other, the next thing I saw was cups flying in every direction. then for the next two hours we encountered severe turbulence. One minute I was looking at the sky out of the window and the next at the ground. When we landed the pilot came into the cabin and said he had never experienced anything like before. I have never seen so many people being sick on an aircraft.