https://unknownportal.com/videos/watch/e06250f9-4118-40a1-91b7-da4ff370788b Note #1: Documentary was produced about 4 years before NIST finally came up with its own collapse-initiation hypothesis in Aug. 2008, dismissing FEMA-BPAT's idea of transfer structures failure on the mechanical floors 5-6 due to diesel fires, but also the WTC1 debris-impact damage as the collapse cause. Note #2: History Channel shows falsely animations and actual footage floor trusses from the twin towers while talking about the floor system of WTC7. Looks like a recycling of their floor-truss animations from past documentaries. WTC7 had traditional I-shaped girders and beams as floor support, not floor trusses. Note #3: See at 2:40 . It would have been better to let Jonathan Barnett explain the reason, why he and the rest of the FEMA-BPAT had no access to the WTC7 debris pile, instead of the narrator taking over. Featuring: Prof. Jonathan Barnett (Worcester Polytechnic Institute, FEMA/ASCE WTC BPAT member, Oct. 2001-May 2002), Christopher Marrion (Arup Fire, FEMA/ASCE WTC BPAT member, Oct. 2001-May 2002), Irwin G. Cantor (Cantor Seinuk Group, chief structural engineer of original WTC 7), Janno Lieber (Senior Vice President of Silverstein Properties' subsidiary firm World Trade Center Properties). (NIST = National Institute of Standards and Technology, FEMA = Federal Emergency Management Agency, BPAT = Building Performance Assessment Team, ASCE = American Society of Civil Engineers.) Segment taken from DVD version of Modern Marvels: Engineering Disasters - Episode 13 (History Channel, first aired: Nov. 17, 2004). New reupload after YouTube has damaged the previous re-upload from March 21, 2014, by it's additional recompression around 2016, introducing nasty blocking artifacts throughout the video. Link to the former re-upload (now set on Unlisted mode): https://youtu.be/e0sI8KjH0DE Tue, 10 Nov 2026 00:42:41 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://unknownportal.com https://unknownportal.com/lazy-static/avatars/8e1b22ce-9e45-498c-bf3b-05cc77b487a2.gif https://unknownportal.com/videos/watch/e06250f9-4118-40a1-91b7-da4ff370788b All rights reserved, unless otherwise specified in the terms specified at https://unknownportal.com/about and potential licenses granted by each content's rightholder.