Well 4chan has taught me something today…
Just google it …
https://untappedcities.com/2017/06/30/the-911-teardrop-memorial-in-bayonne-new-jersey-a-controversial-history/
https://www.thoughtco.com/911-tear-drop-memorial-from-russia-3299579
just for fun ..
https://www.snopes.com/fact-check/tear-drop-monument/