Except that "alien technology" really means Nazi technology; Standard Oil shelled out a lot of shekels at the time to effectively disguise the technological advances of the Germans of the time, and there was even a contract that decided that they would have to convince the people by any means necessary that this technology, should it ever appear, was from "aliens" rather than admit that it was from the Germans. The reason for this is, firstly, that they did not want the Germans to be honored for their achievements in the future and, secondly, the fact that many of these inventions are based on propulsion energy that does not require oil combustion or explosions. Of course, Standard Oil wanted to preserve its monopoly and the associated power status by making alternative technologies disappear. It is therefore no coincidence that the first "UFO" sightings date from the period immediately after the war in the form of antigravity-powered flying machines.