Yeah, well, you see here Dusty, I am a firefighter. I have smelled hundreds, possibly even thousands of fires. This is not including the fires that I have smelled in my back yard, or while camping.
Fires do have a distinct smell. Wood smells unique. Paper smells unique. Electrical smells unique. Petrol products smell unique.
But you see, when you have things like bodies, hydrocarbons, and other items burning, it makes a unique smell. Most people have not smelled burning flesh. I have. It has a VERY unique smell. Mix all them together, and you have a single unique smell. Most had not smelled anything like that. I certainly hadn't. But, was I (or any of the other firefighters there) suprised?
Not one damn bit.
Is it really that hard to figure out what would possibly be on fire at the WTC? Wow, keep smoking that pot!
BTW, please explain why you think a tool like this
http://firechief.com/mag/firefighting_waterjet_technology_cuts/ might have been invented.
It will help if you read the article.