Construction trash truck
So in all the super secret cover-up 9/11 bs they had a truck come in that said demolition on the side?

yeah you know like you can bring about 2 tons of explosives put it in a building where people are working and no one will notice it. no one ever called home and said something like "guess what they are drilling this holes and putting some stuff in it, I wonder what for?"
not only that but they actually stick around with trucks labeled "hey we blowing up the buildings" and you call that a conspiracy? if it was actually planned for one they would never advertise it. second, i have worked in a building about 60 stories high, if I see people drilling on the support pillars, I sure as hell not gonna show up for the next month or so and yes I would tell everybody why. you know the towers had some pretty smart people working on the floors and if they saw anything strange they would sure as hell tell about it.
and yes look at this link.
http://www.manta.com/c/mmjb1d2/manhattan-demolition-co-incsemp