Bullcrap !! That workforce is going to know the basics of what the project is doing. They will know if they are building a dam, an airplane, a high-rise building, a ship, a canal, etc. And a huge workforce would be required to rig the WTC for implosion. A 9-11 conspiracy by the US gov't, rigged to look like kamakize Muslims, would require thousands of operatives. No conspiracy that requires that many operatives over that length of time would ever get off the ground.