Why was there no rescue helicopters?

Originally posted by jfj123
So then what is their explanation as to why the buildings collapsed?

Well reports talk about the combination of planes impacts and fire but then they are contridicted by the reports of the builidngs withstanding the planes impacts and that the fires did not burn long enough or get hot enough to cause the collapse. Also its been 6 years and NIST cannot tell us why builidng 7 collasped.

We do not have the FBI crime scene reports so we cannot say exactly what happened.

ultima1,
Here is a thread stating much better then I, about what happened to the WTC
regarding physical damage, heat, weight.

www.abovetopsecret.com...

Thought you might like the read.

Originally posted by jfj123
Thought you might like the read.

Thought you might like this post from NIST about additional wind load testing.

www.nist.gov...

The National Institute of Standards and Technology (NIST) reported on Sept. 17 that it has done additional analysis of the wind “loads” that the World Trade Center (WTC) towers were originally designed to resist—critical data to help the agency better assess the overall strengths and baseline performance of the two buildings before they were brought down by the terrorist attacks of Sept. 11, 2001. The work is being conducted as part of NIST’s federal building and fire safety investigation of the WTC disaster.

NIST recently completed its review of the original 1960s-era source documents containing wind tunnel test data and wind load estimation methods used for the towers, calculated the wind load estimates based on a clearer interpretation of this information, and determined the values actually used in the design of the buildings. These clarified original design wind load estimates all exceed those established by the New York City building code prior to 1968 (when the WTC towers were designed) and through 2001 (when the towers were destroyed). The values also are higher than those required by other selected building codes of the era, including the relevant national model building code.

Wind load capacity is a key factor in determining the overall strength of a tall building and is important in determining not only its ability to withstand winds but also its reserve capacity to withstand unanticipated events such as a major fire or impact damage.

Also NIST has changed its story about the builindgs collapsing from the pancake theory.

www.youtube.com...


[edit on 30-9-2007 by ULTIMA1]