Punto WTC7-3: Reporte Final del Instituto Nacional de Estándares
Punto WTC7-3: y Tecnología admitiendo que el World Trade Center 7
Punto WTC7-3: se Derrumbó en Caída Libre sin Explosivos

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La Versión Oficial

En su reporte final sobre el World Trade Center 7, [1] emitido en noviembre de 2008, el Instituto Nacional de Estándares y Tecnología finalmente admitió que el World Trade Center 7 había entrado en caída libre por más de 2 segundos. Sin embargo, siguieron afirmando que el World Trade Center 7 se derrumbó a causa del incendio, y sin la ayuda de explosivos.

La Evidencia Revisada

El análisis científico [2] demuestra que el colapso en caída libre de un edificio con estructura de acero no puede ser causado por un incendio, sin la utilización de explosivos (hecho que el investigador y jefe del Instituto Nacional de Estándares y Tecnología, Shyam Synder admitió [3] en sus discusiones sobre el Borrador Público del Instituto Nacional de Estándares y Tecnología en Agosto de 2008).

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Referencias para el Punto WTC7-3
NIST NCSTAR 1A, Final Report on the Collapse of World Trade Center Building 7, November 2008, p. 45.
Chandler, “WTC7: NIST Finally Admits Freefall (Part III)”, January 2, 2009, at 1:19 minutes.

This analysis has been confirmed by NIST itself, in “Questions and Answers about the NIST WTC 7 Investigation”, NIST, August 2008 (originally at www.nist.gov/public_affairs/factsheet/wtc_qa_082108.html). This version of the document, which was posted at NIST’s website at the time its Draft version of its WTC 7 report was published, has been replaced by a version that was updated September 17, 2010, in which NIST continues to acknowledge a 2.25-second stage of “gravitational acceleration [free fall]”.

Sunder said: “A free fall time would be [the fall time of] an object that has no structural components below it. … The … time that it took … for those 17 floors to disappear [was roughly 40 percent longer than free fall]. And that is not at all unusual, because there was structural resistance that was provided in this particular case. And you had a sequence of structural failures that had to take place. Everything was not instantaneous”. (“WTC 7 Technical Briefing”, NIST, August 26, 2008). Although NIST originally had a video and a transcript of this briefing at its Internet website, it removed both of them. However, the video is now available elsewhere. Also available is its transcript, under the title “NIST Technical Briefing on Its Final Draft Report on WTC 7 for Public Comment”.


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