Comes from “New York Firefighters: The Brotherhood of 9/11” (Discovery Channel, 2002 – sorry no full video link). Title should say “NY Firefighters Discovery 18 and 6”, because 18 features only this new view… in slow motion from an earlier point. File 6 is in regular speed and continues later into the collapse of the core remnants (after the FireLine Video clip).
NIST 14: NY Firefighters Discovery 18 (partial)
YouTube 1
