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The US Department of Defense says there is no evidence that aliens have visited Earth.
Aliens visit:
In an effort by the US Pentagon to investigate reports of aliens, it says there is no evidence that extraterrestrials have visited or crashed on Earth.
America Description
The US Office of the Director of National Intelligence reported in a June 2021 report that between 2004 and 2021, 144 UFOs (unidentified flying objects) were detected and 80 UFOs were captured by sensors.
Also, we haven’t seen any extraterrestrials so far, we are still at the early stage to say this and it is still being researched.