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NIST Website/FOIA 09-42 -- WNBC Chopper 4 Tape (WTC2 Plane Impact/WTC 2 & 1 Collapses)

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Published on Sep 10, 2012

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/Co...


(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/Co...


(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/Co...


(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

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