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File  BPBquelle12

Die Gebäude stürzten in 10 Sekunden.

1.  NIST (National Institute of Standards and Technology)  estimated the elapsed times for the first exterior panels to strike the ground after the collapse initiated in each of the towers to be approximately 11 seconds for WTC 1 and approximately 9 seconds for WTC 2. These elapsed times were based on: (1) precise timing of the initiation of collapse from video evidence, and (2) ground motion (seismic) signals recorded at Palisades, N.Y., that also were precisely time-calibrated for wave transmission times from lower Manhattan (see NIST NCSTAR 1-5A).

Questions and Answers about the NIST WTC Towers Investigation

Siehe auch: Was uns die Medien über die Anschläge auf das World Trade Center vermitteln