The tank recovery vehicles were used to ram the walls, and pump in massive quantities of CS gas. They were the “secret weapon” modified for that very purpose. In sufficient quantities, the CS gas not only will extinguish life, but it will become explosive, as in a grain elevator explosion.
I remember the news reports at the time and a government official, I think was military, even described the use of the tank recovery vhicle to ram through walls and deliver CS gas.
Without question, this is proof the military will attack civilians and they won’t even question why.
And when burned, as at Waco, CS powder in suspension in the air converts to phosgene gas.