The American lunar program of the late 60s - early 70s of the last century is shrouded in mystery. It is still unknown whether the Americans ever visited the moon. Most likely, they did. However, they found there something that, on the one hand, threw them into shock, and on the other, forced them to classify their flights and carry them out in the future in secret from the world community.
It is officially known that the Apollo 19 and Apollo 20 expeditions were never carried out due to, as reported, financial problems with NASA and the ship accident during the Apollo 13 expedition. However, according to various sources, the 19th and 20th expeditions nevertheless went to the moon, but their results remain classified to this day.
The United States made the decision to be the first to investigate this object, therefore, in all intent to get ahead of the Soviet Union in this direction, at the same time hiding its plans and actions. One of the components of the measures to conceal the true plans of NASA was an unexpected complete rejection of the further implementation of the lunar program. However, on August 16, 1976, a manned flight to the moon did take place.
It is difficult to say what results this expedition had, but after it in the USA a number of fundamental discoveries in the field of electronics and semiconductors followed. Who knows, maybe the Americans got the relevant knowledge from an alien ship that suffered an accident. Be that as it may, pictures and videos of an alien ship lying on the Moon have not been refuted until recently by any specialist.
You can read more about Apollo 20 in the article "Apollo 20 found a huge spacecraft of extraterrestrial origin on the Moon"
