Groups within our military have been recovering relatively primitive ET technology for decades, from crashes and from crafts left behind. The "men in black" were NSA. NASA assisted the UFO coverup by (poorly) hiding crafts and bases throughout the solar system.
Abandoned Craft on the Moon
#NEIOH (2020) "This is actually a very Ancient Craft that crashed here and was abandoned. It remains intact but was not worth the recovery of this Race from outside our Solar System. The occupants were picked up by Friends. They are called MOKAS, as their planet is MOKA. They stand 8 feet tall with grey skin. Very Friendly. Very low in Technology."
1967 Lunar Orbiter Mission - https://lpi.usra.edu/resources/lunarorbiter/frame/?3073
Abandoned Craft on the Moon
#NEIOH (2020) "This is actually a very Ancient Craft that crashed here and was abandoned. It remains intact but was not worth the recovery of this Race from outside our Solar System. The occupants were picked up by Friends. They are called MOKAS, as their planet is MOKA. They stand 8 feet tall with grey skin. Very Friendly. Very low in Technology."
1967 Lunar Orbiter Mission - https://lpi.usra.edu/resources/lunarorbiter/frame/?3073