Scott Grainger, is a fire protection engineer who holds licenses in 13 states. He has been a practicing engineering for 39 years, the last 25 of them in private practice. Half of his practice is in forensic engineering.
According to NIST, the failure occurred at column 79 on level 12. This means basically they're talking about a single columnar collapse, or failure, that resulted in a total collapse of the building. That just does not make any sense.