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wildbilln864 Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Dec-31-06 12:08 PM
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Good discussion of the physics...
can be found here:
Link
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nebula Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Dec-31-06 03:19 PM
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1. Link is broken
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SidDithers Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Jan-01-07 02:36 PM
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2. Fixed your link...
http://forum.physorg.com/index.php?showtopic=7444

And I'm encouraged to see you linking to a real science forum. Nice to see you're expanding your horizons.

Sid
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spooked911 Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Jan-01-07 02:54 PM
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3. Some good stuff there, I liked this post::
One of the well known photographs by Aman Zafar taken several kilometers to the west of the WTC site from a location across the Hudson River, shows WTC 1 approximately half way through its collapse. The exterior shell of the structure has largely been shed but about half of the original core remains standing behind, and a little to the right of, the 194 meter tall WFC 3 building with the familiar black dome. (The known distance between WTC 1 and WFC 3 allows one to estimate that the portion of the WTC 1 core still standing is in fact about 200 meters tall or about half the original, 416 m, height of WTC 1.) Another AZ photograph of WTC 1 taken a few seconds later shows the core tilting very slightly to the south before disappearing from view presumably by toppling over into the ever-expanding cloud of dust and debris emanating from ground zero.

It is of great importance that this momentary survival of the WTC 1 core should have been captured on film because it reveals the true nature of the WTC 1 collapse. Furthermore, this brief glimpse of the survival of the building’s core should lay to rest any claims that WTC 1 was destroyed by a simple, symmetrical, pancake collapse. But to confirm this description of the remarkable failure of WTC 1, we need to look for PHYSICAL EVIDENCE that the core toppled over in the manner described above. We are able to do this by surveying the debris field and associated damage to structures to the south of WTC 1.

The WTC site-plan shows that WTC 3, a 22-story steel frame building housing the Marriott Hotel, was located due south of WTC 1 with its southernmost façade about 160 meters from the vertical axis of WTC 1. During 9-11, WTC 3 was first struck by debris from the collapse of WTC 2; however, the resulting damage was limited to one section near the middle of the building. In fact, in reference to the damage to WTC 3 caused by WTC 2, FEMA state on page 7 of Chapter 3 of their Report:

“The two northernmost bays of WTC 3 remained intact all the way to the roof. A similar, but lesser condition existed in the southern bays.”

In reference to the damage to WTC 3 caused by the later collapse of WTC 1 FEMA state:

“Debris from WTC 1 fell along the entire length of WTC 3.”

Thus we may safely conclude that it was the collapse of WTC 1, rather than WTC 2, that brought about the near-total destruction of WTC 3. In fact, photographs in the FEMA report reveal that only two lower floors at the southernmost end of the building survived the onslaught of debris from the WTC 1 collapse. Other photographs available in the MCEER Report (MCEER-02-SP02) on damage to buildings near ground zero, show WTC 1 debris with a north to south alignment draped along the roof and extending well beyond the southern façade of WTC 3. This suggests that WTC 3 was destroyed by the impact of a very large section of WTC 1.

Based on such evidence we must conclude that the destruction of WTC 3 was caused by the toppling of the approximately 200 m tall core section of WTC 1.

This, of course, begs the question as to why the WTC 1 core toppled in this way. Perhaps the answer to this puzzle is to be found in the strange "LUNAR MODULE" structure, visible in photos of ground zero available at Parrhesia.com.

The lunar module I refer to is actually the damaged remains of A CORE SECTION of WTC 1 protruding 20 meters out of the WTC 1 rubble pile.
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