1. I have completed a video showing the analysis of the Balzac-Vitry controlled demolition that used hydrolics rather than explosives to initiate a total demolition. This analysis shows deceleration upon collision, as predicted in the paper, "The Missing Jolt: A Simple Refutation of the NIST-Bazant Collapse Hypothesis," by Graeme MacQueen and Tony Szamboti. It also illustrates the symmetry of destruction, contrary to the "crush down" followed by "crush up" scenario propounded by Zdenek Bazant. http://www.youtube.com/watch?v=NiHeCjZlkr8

On July 19, while I was in Portland to speak at the American Association of Physics Teachers conference I was interviewed by former KPFA programmer Sue Supriano, who now lives in Portland and does radio and podcast interviews for a show called "Stepping Out of Babylon." The interview can be downloaded as an mp3 file and is available here:
http://www.suesupriano.com/article.php?&id=166

(Written and narrated by David Chandler / Edited by Debora Blake)

http://www.youtube.com/watch?v=UaOgwsv7R9E

Craig Bartmer, an NYPD officer who was present at the destruction of World Trade Center Building 7, testifies that he heard a series of explosions, "Thum, thum, thum, thum, thum" preceding the fall of the building. At the same time a TV interview is being conducted down the street, far from the building. The microphone picks up the same series of sharp, percussive sounds, confirming Bartmer's description. NIST artificially ruled out all such testimony by setting up a hypothetical loudness threshold for sounds it considered to be capable of destroying columns in the building.  The video goes on to question NIST's computed loudness threshold below which they would not investigate explosions.

I have revisited and extended some of my early measurements of high speed massive projectiles from the World Trade Center on 9/11. The results for the three projectiles measured: 55 mi/hr, 45 mi/hr, and 78 mi/hr. I don't claim this is smoking-gun evidence of explosive demolition all by itself, but it is part of the puzzle and it is more compatible with the explosive demolition hypothesis than simple gravitational collapse.
(On a technical note, if you are looking at the numbers in the three measurements, the third measurement is taken while the video was zoomed in, relative to the calibration frame. The numbers shown have to be scaled down by a factor of 1.701 to give the stated results.)

Where to find my videos:
I have moved my videos from the AE911Truth YouTube site to http://youtube.com/user/DavidChandler911. Please update any links or embeds you may have had in your web pages. The AE911Truth YouTube page (http://youtube.com/user/ae911truth) has playlists with links to these videos. Sorry for the disruption.

FYI, I also have another YouTube site with some of my older videos: http://youtube.com/user/DavidSChandler. Also my own 9/11 Truth web page is http://www.911speakout.org.
--David Chandler

This is a study of the overall downward acceleration of WTC1, the North Tower of the World Trade Center. During this investigation it was discovered that the one feature that kept pace with the original acceleration of the roofline was the leading wave of ejections on the west wall.

[This is an updated version of the video to correct some errors in the characterization of the corner columns and to generally improve the information content. Rather than simply delete the old YouTube video I've added a link to go from it to the new one. This should cover those who have already embedded or linked to the old version. Sorry for the hassle, and thank you members of the AE911Truth team who caught the error. -- DSC]

----------------

A close-up view of debris being ejected from the South Tower of the World Trade Center as the 30-floor top section falls to the east shows numerous smoking projectiles that look like comets. Several of them can be seen to explode. One such exploding projectile is followed here. It ejects two fragments, both of which undergo secondary explosions. (Note, the rising fragment to the left of the projectile under consideration appears to be a tumbling object that alternates from black to white to invisible. It passes behind one of the fragments described in the video.)

--David Chandler

Near the end of the video I posted yesterday I pointed out a projectile that changed directions midair while trailing white smoke. After finding that projectile, I looked for it in other videos of the WTC2 collapse. I found a video from a similar point of view to the first (and Nate found me a high-res version of it), except in this video the trail can be followed all the way to the bottom of the collapse. This follow-up video explores the significance of this find.

This view of the destruction of the South Tower of the World Trade Center displays a remarkable number of features that support the interpretation that it was destroyed by explosives. I want to acknowledge the tremendous service provided by Nate Flach who serves as the defacto "video archivist" for AE911Truth. He is the one who first called this video to my attention, because of the huge number of simultaneous squibs on the west side of the building above the impact point.

http://www.youtube.com/watch?v=xG2y50Wyys4

The roofline of WTC1 (The North Tower) begins dropping with sudden onset and accelerates uniformly downward at about 64% of the acceleration of gravity (g) until it disappears into the dust. This means it is meeting resistance equal to about 36% of its weight. The implication of this, however, is that the force it is exerting on the lower section of the building is also only 36% of the weight of the falling section. This is much less than the force it would exert if it were at rest. The acceleration data thus prove that the falling top section of the building cannot be responsible for the destruction of the lower section of the building.

WTC7: NIST Finally Admits Freefall (Part III) is now posted on YouTube. This concluding segment explores the implications of NIST's concession (to easily observed reality) that freefall occurred.

This is not the "Part II" I had originally envisioned. That will have to wait for Part III. In following up on the erroneous measurement described by John Gross in Part I, I decided to look more carefully at the measurement and find the video frame NIST claims marks the beginning of the collapse. What I found is that there is no motion of the roofline for at least 20-30 video frames after the point identified by John Gross. In other words, the measurement is a complete fabrication with the goal of producing a "measurement" to agree with the result predicted by NIST's collapse model. This result is sufficiently significant to merit its own video.
--David Chandler, AE911Truth

http://www.youtube.com/watch?v=V0GHVEKrhng

NIST has now officially accepted that WTC7 came down with the acceleration of gravity, but they still couch it as a phase in a 5.4 second interval they claim matches the 5.4 seconds required for their model to collapse 18 floors. The starting point of their 5.4 second interval is totally arbitrary. This new video highlights the August 26 technical briefing and allows Sunder and Gross to shoot holes in their own feet. Part II, which is planned to come out in a week or two, will go into detail about the implications of freefall. A list of bullet points has been compiled on that topic already, but if anyone has a special take on it that they would like to feed into the mix, please contact me at dchandler@ae911tuth.org.