WTC 7 had just undergone a 20 million dollar fix-up to reinforce it as a "command center." If the day was a government-op, chances are the on-site monitoring was done from the newly-fortified floor in WTC 7 that overlooked the complex.
Also, records had been pouring into WTC 7 for months. Most notably SEC records regarding hundreds of ongoing fraud cases (things like Enron). Lots of old treaties and land records had been placed in WTC 7 too. Lots of paperwork concerning court cases, ownership of real estate, etc. The BATF, FBI, CIA, etc. regional offices were in the bldg., and records concerning their murderous "screw ups" were located there. The reason for the takedown of the building could have been simply to do the biggest expungement of records in history.