You don't need a microscope to see the effects of man-made explosives and therm-anything.
true- remember sisson could only get "little metal" to dissolve in 24 hrs with his hypothesis. he is being a gatekeeper with the exact amount. ive emailed the library to get his graduate students thesis but apparently she didnt graduate so they dont have it. i emailed prof sisson who also said the same about the student and he never gave me the exact amount of dissolved steel over the 24 hr period.
here is some good pieces that were seen but apparently recycled.
http://www.nytimes.com/2001/10/02/science/scarred-steel-holds-clues-and-remedies.html
"One piece Dr. Astaneh-Asl saw was a charred horizontal I-beam from 7 World Trade Center, a 47-story skyscraper that collapsed from fire eight hours after the attacks. The beam, so named because its cross-section looks like a capital I, had clearly endured searing temperatures. Parts of the flat top of the I,
once five-eighths of an inch thick, had vaporized.
Less clear was whether the beam had been charred after the collapse, as it lay in the pile of burning rubble, or whether it had been engulfed in the fire that led to the building's collapse, which would provide a more telling clue.
The answer lay in the beam's twisted shape. As weight pushed down, the center portion had buckled outward.
''This tells me it buckled while it was attached to the column,'' not as it fell, Dr. Astaneh-Asl said, adding, ''It had burned first, then buckled.''
he saw this just alittle over a week after the attack.
another one-
http://www.berkeley.edu/news/berkeleyan/2001/10/03_grou.html
"
Steel flanges had been reduced from an inch thick to paper thin", Astaneh said.
notice he is talking about more than one. he saw this between sept 19-29th.
and again-
http://www.nytimes.com/2001/11/29/n...ange-collapse-7-world-trade.html?pagewanted=2
"A combination of an uncontrolled fire and the structural damage might have been able to bring the building down, some engineers said.
But that would not explain steel members in the debris pile that appear to have been partly evaporated in extraordinarily high temperatures, Dr. Barnett said."