Ed Munyak, has been a licensed fire protection engineer for the last 25 years. He has worked for a number of organizations, including the federal government, municipal governments, and large insurance companies.
The media portrayed these fires as being extremely hot, but the fires were not that hot in World Trade Center 1 and 2. If you look at NIST's own data, you can see this. And to use our own powers of observation, you can tell by seeing these fires, and seeing black smoke come out the windows: that means that the fires were oxygen-starved.