https://www.coasttocoastam.com/article/watch-airline-passenger-films-triangular-ufo-over-utah
https://www.reddit.com/r/aliens/comments/18g999c/tr3b/
https://www.reddit.com/r/aliens/comments/1bj31cx/tr3b/
https://www.reddit.com/r/Futurology/comments/bgoh9y/us_navy_patent_released_of_triangular_aircraft
https://paranormal-intersection.blogspot.com/search?q=Triangular+UFO