A planned training exercise would explain why they restrained officers and citizens who were willing to go in hot. The officers think its just a drill so they hang out. By the time the ignorant drill participants realize that real planes did hit the towers or the devices they placed were real or that actor the glowbois escorted in has a real weapon, then its too late. They all go silent because they just saw first hand what the Satanists will do to complete their agenda