Slide Show of 1st Hit Damage:
Choose the Option at target web page: “The Attack Begins”
Video Which Includes the Initiation of Collapse
Based on these videos, I would suggest the following:
1. The initiation of the explosions starting the collapse, based on the orange hot spots and then a moment later a horizontal row of explosions are roughly as high up as the plane stuck WTC 1.
2. For those who think that the idea that this a “top-down” collapse, (not a bottom up as is usual for other video specimens of CDs), you are omitting the details of clear instantaneous events which do happen to commence near the top of WTC 1. However, whatever one attributes the collapse with the idea that the “plane” crash damage, and ensuing fires, and loss of structural integrity, it is a complete nonstarter. Look at the evidence: there is no way to negate the idea that detonations of some type are underway.
The following screen snaps are presented in sequence:
(this snaps occur at the time stamp of about 1:31 remaining in the video as shown by the video player at the target web page)