What is missing is the SOUND of EXPLOSIONS. There are no silent demolition explosions. None of the of thousands of people that were close to the towers report explosions loud enough and timed to be reports of man-made demolition.
.prod.sandia.gov/cgi-bin/techlib/access-control.pl/2001/012267.pdf
That's www before the .prod If the mods allow that link through for someone without enough posts yet great, otherwise simply do a google search for "SAND2001-2267" which is the report number
SANDIA REPORT
SAND2001-2267
Demolition Noise Abatement
Technique Demonstration
Dated August 2001 (Experiements conducted in 2000).
"Public concern regarding the effects of noise generated by the detonation of excess and obsolete explosive munitions at U.S. Army demolition ranges is a continuing
issue for the Army's demilitarization and disposal groups. Recent concerns of citizens living near the McAlester Army Ammunition Plant (MCAAP) in Oklahoma have lead the U.S. Army Defense Ammunition Center
(DAC) to conduct a demonstration and evaluation of noise abatement techniques
that could be applied to the MCAAP demolition range.
With the support of the DAC, MCAAP, and Sandia National Laboratories (SNL),
three types of noise abatement techniques were applied: aqueous foams, overburden
(using combinations of sand beds and dirt coverings), and rubber or steel blast
mats.
Eight test configurations were studied and twenty-four experiments were conducted
on the MCAAP demolition range in July of 2000. Instrumentation and data acquisition systems were fielded for the collection of near-field blast pressures, far-field acoustic pressures, plant boundary seismic signals, and demolition range meteorological conditions. The resulting data has been analyzed and reported, and a ranking of each technique?s effects has been provided to the DAC."
Conclusion
"Note that the 'standard' practice provides an almost two-thirds reduction in
peak acoustic pressure.
...
A comparison of the alternative noise abatement techniques and the uncovered TNT data is provided in Figure 34. This figure shows a ranking of average acoustic peak pressures of the alternative
techniques viewed relative to the standard. While the combination blast mat configuration showed favorable acoustic pressure reductions, they were destroyed in one shot and therefore would be a disposable item." (Blast Mats cost $5K)
Therefore we can see while an unexposed explosion could be a (literally) ear splitting 140db - standard industry practise would be expected to reduce noise by two-thirds. And the US had also conducted tests on blast mats in 2000 and reported this information in August 2001, saying that $5000 blast mats "showed favorable acoustic pressure reductions". Therefore, if there was a determined attempt to perform and disguise a Controlled Demolition on WTC buildings then noise levels could be reduced to the levels which were reported on the day.
It is also standard practise to produce a noise abatement report for any controlled demolition in an urban environment.
So please everyone stop trying to argue no explosives because no one heard any explosives (which also ignores everyone who actually did hear them)