RE: ...so many shooters...
The three teams in the “turkey shoot” triangulation as portrayed in the Oliver Stone film JFK.
https://www.youtube.com/watch?v=2gaEkPaykJo
Do you believe it?
Before citing Oliver Stone's film on the subject, you might find this website interesting:
It's worth looking at. There are multiple times throughout this movie that Oliver Stone simply made schit up to sell a film.
Which is unfortunate, considering the number of people in this country who get their information from video/television/film (and not from reading).