In the above, a TV news team set off from among a group of firefighters to get footage of WTC7 prior to collapse. Listen to the background chatter very carefully from the beginning, at around 0:09, up to and especially at 0:30 to 0:32… This is a NIST FOA release; I think NIST might have dropped us a clue. They’re engineers, not Men in Black, and they can’t have been happy about having to publish a fabricated report.