The US military was testing and flying UFO design aircraft in the 40's and 50's. They had as many as 35 saucer projects with vertical lift off and descent. The most highly classified was known by code name Silverbug. Near the end of WWII the allied forces had gained superiorty over the Germans. Or so it seemed. The Germans were looking for a superior craft. The SSE and Vril societies were building craft that looked like UFO's and were capable of vertical take-off's and landings because most of their runways had been destroyed.