Americans arrived to the Moon in 1979 not in 1969, and videos that they showed us were made in a Hollywood set by Stanley Kubrik, the reason of the trip to the Moon is because they watched through their telescopes some buildings there, and thought that another country like Rusia was there.
Helped by the tech that obtain from Roswell incident, they sent men to Moon, and aliens were very surprised that with a primitive tech they could reach the Moon. Americans risked the live of astronauts to get that mission.
But... like the man destroy more than build, They tried to dissapear the Moon biuldings with nuclear bombs, and aliens get angry about that, and prohibited to return to the moon.
The moon was a ancient earth with his 7 races like here in earth, and say that has a worse religion than catholic ( the "Holy" Inquisition) and now its only the shell of a planet.