https://unknownportal.com/videos/watch/f56510f9-6bf4-49f1-bd1c-084256d861a7 0:02:13 - Second plane approaches and crashes into the South Tower at 09:02:59am (NIST timeline). 0:03:18 - Smoke pouring out of the mechanical-floor vents on 75th and 76th floors, at WTC2 north face. 0:43:12 - First mentioning of the Pentagon attack, at around 9:43am. 0:56:20 - Molten substance falling down from floors 80-81 along the north face of WTC2, near the northeast corner. 0:58:24 - South Tower's collapse initiated at about 9:58:57am. 1:27:47 - Destruction of the North Tower begins at 10:28:22am. Recording times (based on NIST timeline): 0:0:00 - 09:00:29am to 10:36:34am Time Uncertainty: 1 sec One single long shot. North and northwest views. (elevated). Recorded from Chopper 4, WNBC-TV. Reporter: April Amonica MPEG-2 video decompressed/uncompressed clips deinterlaced, resolution upscaled and clarity increased. Contrast, gamma, color saturation, colors and audio adjusted. The chopped tape was reconstructed from various sources: (Part 1 - 0:00:00) NIST WTC Disaster Study World Trade Center Disaster Investigation Materials Folder: Organized Photos and Video Clips 1st Lv. Subfolder: VideoClips 2nd Lv. Subfolder: WNBC NIST Dub #10 - Comp Reel Tape #1 Clip: WNBC Dub10 48 Source: http://wtcdata.nist.gov/gallery2/v/Collected+Materials/Organized+Photos+and+Video+Clips/VideoClips/WNBC+NIST+Dub+%2310+-+WT+Comp+Reel+%231/WNBC+Dub10+48.avi.html (Part 2.1 - 0:03:08) NIST WTC Disaster Study World Trade Center Disaster Investigation Materials Folder: Organized Photos and Video Clips 1st Lv. Subfolder: VideoClips 2nd Lv. Subfolder: WNBC NIST Dub #6 - WNBC Helicopter Joined Clips: WNBC Dub6 01-24 Source: http://wtcdata.nist.gov/gallery2/v/Collected+Materials/Organized+Photos+and+Video+Clips/VideoClips/WNBC+NIST+Dub+%236+-+WNBC+Helicopter/ (Part 2.2 - Missing seconds between some clips from WNBC NIST Dub #6 filled with bits from second copy) NIST WTC Disaster Study World Trade Center Disaster Investigation Materials Folder: Organized Photos and Video Clips 1st Lv. Subfolder: VideoClips 2nd Lv. Subfolder: WNBC NIST Dub #2 Source: http://wtcdata.nist.gov/gallery2/v/Collected+Materials/Organized+Photos+and+Video+Clips/VideoClips/WNBC+NIST+Dub+%232/ (Part 2.3 -- 1:06:54 - Missing portion of about 11 seconds replaced by frames from full tape WNBC NIST Dub #2. No or very low volume detected at the right audio channel, unlike the Cumulus clips. The audio was enhanced to pseudo-stereo by splitting the left channel in two mono channels and adding simulated stereo chorus to both. NIST FOIA 09-42 Release #25 Folder: 42A0093 - G25D3 File: DVD Video Source: 911datasets.org Fri, 11 Sep 2026 04:47:01 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/f56510f9-6bf4-49f1-bd1c-084256d861a7 All rights reserved, unless otherwise specified in the terms specified at https://unknownportal.com/about and potential licenses granted by each content's rightholder.