A General (I can't remember His name and was also at Ruby Ridge where He kept the fedz from killing Randy Weaver with a Shotgun on a tracked rover AND from burning the Weaver Cabin and everyone in it with a FUEL BLADDER/with Incendiary Device ON A CHOPPER and Dropping it.) had an Explosive Expert that determined that Cutter Charges were used on the Main Columns along with unexploded Detcord still on the remaining Columns.
The name of the “General” was Bo Gritz.
You’re correct about the chopper/fuel ploy at Ruby Ridge, the only reason that didn’t eventuate was owing to the bravery of some journalists, who, realizing what was about to happen, burst out of their concealed filming location:
They jumped up and down, pointing to their TV mini-cam, emphasizing that there would be a video record.
Those guys did get their a$ses kicked royally in 30 minutes, but the chopper did go away and there was no fire.