It is not out of the question that artifacts of these visits still exist, or even that some kind of base is maintained (possibly automatically) within the solar system to provide continuity for successive expeditions. Because of weathering and the possibility of detection and interference by the inhabitants of the Earth, it would be preferable not to erect such a base on the Earth’s surface. The Moon seems one reasonable alternative. Forthcoming high resolution photographic reconnaissance of the Moon from space vehicles – particularly of the back side – might bear these possibilities in mind. – Carl Sagan (source)
Controversy has surrounded the Moon for a very long time, we have leaks, research and information from some very credible sources who have, over a span of decades, been relaying to the public that our Moon is not what we think it is, and that there’s also some type of extraterrestrial presence on the Moon.
One example would be the testimony of Colonel Ross Dedrickson, who was responsible for maintaining the inventory of the nuclear weapon stockpile for the United States, he had a long stint with the US Atomic Energy Commission.
Shortly before his passing, he told the world that the US tried to detonate atomic weapons on the Moon for scientific purposes, measurements and whatnot and that this project was halted by extraterrestrials, who would not allow us to detonate any nuclear weapons in space. These were some interesting comments because he is one of the hundreds of high ranking military people who have alluded to such things, and we also have a declassified report by the Air Force Nuclear Weapons Center from June 1959 that shows how seriously they were considering the plan, called Project A119.’