Originally Posted By: h2o
"normal operations of a building" that also happen to provide perfectly legitimate answers to the question you posed.


You havn't answered a single question... How is a team of engineers is going to have enough time to plant enough explosives to bring down a building the size of the WTC in a single weekend... Add to that the power was turned off and they had no way to run hammer drills or saws-alls...

Go back and re-read the article you posted... it has nothing to do with surveillance of the building maintancence crews to see if they were planting explosives...

Quote:
Both theories agree the jetliners damaged floor joints and columns inside and outside the buildings. But they vary on whether the fire-weakened columns failed and alone brought down the buildings or whether floor trusses sagged in the intense heat, pulling the columns inward to collapse.

The lost records probably contain vital information that could help answer questions, Sunder said. Investigators are trying to locate copies of many destroyed documents from the building's owners and city agencies.


your evidence is circumstancial at best and pretty thin at that...