https://en.wikipedia.org/wiki/Men_in_black
https://themothman.fandom.com/wiki/John_Keel (JAK) https://en.wikipedia.org/wiki/John_A._Keel
Is it an ET phenomenon or associates of the devil? Perhaps both, especially if its a multidimensional universe.
The "Men in Black" Experience and Tradition: Analogues with the Traditional Devil Hypothesis
https://www.theguardian.com/film/2014/aug/14/men-in-black-ufo-sightings-mirage-makers-movie
According to various reports over the years, the MIB occasionally like to interfere with things.
https://en.wikipedia.org/wiki/John_Keel#Rejection_of_Extraterrestrial_hypothesis
Although some of the MIB could be from earth, others might be from other worlds or even other realms.
https://en.wikipedia.org/wiki/Men_in_black#Ufologists
http://www.strangenewengland.com/podcast/men-black-maine-1976-herbert-hopkins-case 1976-9-11 https://www.youtube.com/watch?v=mwVs82d92t4
"In 1967, Keel popularized the term "men In black" in an article...entitled "UFO Agents of Terror". https://en.wikipedia.org/wiki/John_Keel#Life_and_career
https://www.syracusenewtimes.com/ufos-on-sept-11-2001
Of course everyone was distracted, but if there were beings and unknown crafts or vehicles around, no one would have ever noticed on that day in 2001.
Then in 2011 some think that something else was hovering around.
https://gothamist.com/news/ufo-sighting-over-911-memorial-new-york-at-ufo-alert-level-3
https://thoughtcatalog.com/jacob-geers/2016/04/creepy-stories-of-the-real-men-in-black
https://inexplicata.blogspot.com/search?q=MIB This is such an amazing and insightful blog.
http://therealmeninblack.blogspot.com Nick is one of the best researchers on the planet.