The Official Account
Although NIST did not perform any tests  to determine whether there were incendiaries (such as thermite) or explosives (such as RDX and nanothermite) in the WTC dust, it claimed  that such materials were not present.
The Best Evidence
Unreacted nanothermitic material, “which can be tailored  to behave as an incendiary (like ordinary thermite), or as an explosive,”  was found in four independently collected  samples of the WTC dust (as reported  in a multi-author paper in a peer-reviewed journal).
References for Twin Towers Point 5
- NIST, Answers to Frequently Asked Questions (August 30, 2006), Question 12.
- NIST conducted only a hypothetical experiment and “found no evidence of any blast events.” NIST NCSTAR 1-9, Structural Fire Response and Probable Collapse Sequence of World Trade Center Building 7, Draft for Public Comment, August 2008, p. 357.
- The quoted phrase is from Dr. Niels Harrit, Associate Professor of Chemistry at the Nano-Science Center, University of Copenhagen. E-mail to Elizabeth Woodworth, copied to Dr. David Ray Griffin, June 19, 2011.
- The AMPTIAC Quarterly Newsletter from the Spring of 2002 said: “The 221st National Meeting of the American Chemical Society held during April 2001 in San Diego featured a symposium on Defense Applications of Nanomaterials. One of the 4 sessions was titled Nanoenergetics. This session featured speakers from government labs (DOD and DOE) and academia. … A number of topics were covered, including … Metastable Intermolecular Composites (MICs), sol-gels, and structural nanomaterials. … At this point in time, all of the military services and some DOE and academic laboratories have active R&D programs aimed at exploiting the unique properties of nanomaterials that have potential to be used in energetic formulations for advanced explosives and propellant applications. … Nanomaterials, especially nanoenergetics, could be used for improving components of munitions. … Nanoenergetics hold promise as useful ingredients for the thermobaric (TBX) and TBX-like weapons, particularly due to their high degree of tailorability with regards to energy release and impulse management.” (pp. 43-44).
- Dr. Steven Jones discusses the “chain of custody” of the dust samples in “9/11: Explosive Testimony Exclusive, Part 1,” at 3:30 and 7:58 minutes, and at 0 minutes at Part 2 of 2.
- Niels H. Harrit, Jeffrey Farrer, Steven E. Jones, Kevin R. Ryan, Frank M. Legge, Daniel Farnsworth, Gregg Roberts, James R. Gourley, and Bradley R. Larsen, “Active Thermitic Material Observed in Dust from the 9/11 World Trade Center Catastrophe” (archive copy), The Open Chemical Physics Journal, 2009, 2: 7-31.