What's important is what your methodology says. And so far, it doesn't say anything resembling "scientist".
I hope for your sake that does not appear on your resume.
Aside from which, it appears that you have absolutely no experience with aircraft incidents, major structural fires, firefighting, fire investigation or anything with even the slightest similarity or applicability to what happened on 9/11 and/or the days and weeks afterward.
My original statement stands, you observed substances you have never seen burned before in a kind of fire that you have never observed before.
Not the way you're using it, it isn't. If something smelled like chocolate to me, I would consider having it tested for the presence of sugar, milk solids, cocoa extract, hydrogenated vegetable or palm oil and natural or artificial flavors. That would be a proper scientific investigation and conclusion.
In your case, you have done absolutely nothing of the kind. You you did not take atmospheric samples of the strange smell. You did not visit major structural fires taking samples there, nor did you take samples at air crash sites and you certainly did not compare these samples to each other eliminating everything that was common between them.
That would have been scientific, but that is clearly not where your interest lies. You smelled something strange, and there you came to a dead stop.
You are also not the only one who didn't a damn bloody thing to find out what it was.