These "Truthers" are nothing more than hacks who see a speck and say its a bullet. Suddenly they are building engineers that say WTC7 was a demolition, but can't tell you why it was blown up? Wannabe witnesses to anything, pseudo experts in nothing, but authoritative in all matters!
The horn beeped twice and the second honk was immediately prior to the gunshot by Ruby. The headlights on the station wagon also flashed briefly just at the second honk before the gunshot by Ruby.
Not much evidence of a conspiracy I'll agree, but on the other hand, things were a bit less technologically sophisticated in those days.
The folks who put all of this assassination business together certainly did not anticipate the acoustic evidence, the Zapruder film, and later the Internet, among other things.
I was shown enough compelling information 40 years ago to convince me of the corruption of our system.
Perhaps that is part of the reason that I have since made it my business to know what I am talking about in every case before I express opinions on any matter.