File:Wtc7-nist1a-fig3-15.jpg
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| Description |
English: Downward velocity of north face roofline as WTC7 began to collapse |
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| Source | http://wtc.nist.gov/NCSTAR1/PDF/NCSTAR%201A.pdf | |||
| Author | National Institute of Standards and Technology | |||
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This image is in the public domain in the United States because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:19, 23 April 2009 | | 412 × 281 (34 KB) | Johninwiki (talk | contribs) | {{Information |Description={{en|1=Downward velocity of north face roofline as WTC7 began to collapse}} |Source=http://wtc.nist.gov/NCSTAR1/PDF/NCSTAR%201A.pdf |Author=National Institute of Standards and Technology |Date=2008-11-20 |Permission={{PD-USGov-N |
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