But just step back for a moment and ask yourself who in the hell had the power to do 9/11?
Anyone who took some flying lessons?
Fuck man. You haven't even done the most basic research.
Steel buildings with girders the width of your room don't collapse into a pile of dust from kerosene and impact with aluminum.
And they certainly don't do it straight down onto themselves perfectly every time (3 times in this case) and with complete collapse and all with free fall acceleration (no resistance).
And you are an engineer? Do you do not have a pocket calculator?