First Men on Moon Saw UFOs
First men on moon did not see any UFO. They thought they did first but it was just debris, celestial dust particles.
Also it has been a myth since last 50 years about area 51 and USA having UFO and aliens..etc. If they do, they could have developed/build something extraordinery by this time and used it for their purpose.
All the advancement we see now is purely based on laws of physics and engineering and technology. This misunderstanding will not go away anytime soon because of some people who like to hear what they want to hear.