"In 1945-46... & so on... ordinary airline pilots, crew & passengers would see would see outside their planes... these extraordinary dome shaped... ships... and no one knew where they came from... no one knew what they were. In the beginning most the... governments thought... the Russians thought they were made by the Americans. The Americans thought they were made by the Russians... no one knew precisely how they came to be there, what they were doing and how they had this extraordinary freedom of the air, this ability to appear and disappear and to go at fantastic speeds way out of sight of the planes that they had stood beside for a few minutes... For a few years it was an unexplainable phenomenon. We made jokes about it. Flying saucers... no one knew..."
January 1, 1970
https://en.wikiquote.org/wiki/Benjamin_Creme